1. There's hesitation in his speech

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If you notice a big change in your guy's speech pattern, it could be a sign that he's lying to you! If he's using a lot of filler words like "um" and "well," and there's hesitation in his speech, he's trying to buy time to build a better lie. When someone's lying, they tend to do this subconsciously, so keep an ear out for it!
2. He's blinking A LOT

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Did you know that rapid blinking is considered a sign that someone is worried about getting caught in a lie? It's a symptom of anxiety and/or guilt and shame. Studies show that someone who is lying blinks up to 8 times more after they lie than they would in a normal setting. So be sure to look for this subtle clue!
3. He's putting more effort into his appearance

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Sad, but true. If your man suddenly undergoes a complete physical transformation, it could be a sign he's met someone new. If you notice your man has a new workout routine, better hygiene or an entirely new wardrobe, get those Spidey senses working and pay attention!
4. He seems constantly stressed

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Of course, if your partner is being unfaithful, it's probably causing him some degree of stress. If you notice he's having a lot of mood swings or the vibe seems overall tense, it could be a sign. Especially if you know there's nothing else that would be causing this stress. So if you start picking up on these signs, maybe ask him about it!
5. He slouches around you

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When you're having a normal conversation with your partner, notice his posture. If he's slouched over, it could show signs of guilt or shame. It represents retreating to the fetal position for safety. Most people do this when they know they've done something wrong. He could also rock back and forth slightly when talking to you.
6. He avoids eye contact

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This one seems pretty basic, but it's true for a reason. If someone is trying to hide something from you, the eye contact is one of the first things to change. Making eye contact can be uncomfortable for him if he's cheating, because of feeling shame or feeling uncomfortable from keeping a secret.
7. Or he's making WAY too much eye contact

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On the flip side of this, you may notice an overcompensation in the amount of eye contact. If your guy is smart, he might be aware of the eye contact thing and do his best to hold your gaze. To them, they're trying to make sure things are "normal," but you'll probably be able to pick up that it's out of the ordinary.
8. You notice his phone habits are different

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Guys who are cheating will not want you ANYWHERE near their phone. In fact, you may notice they get incredibly jumpy when you are near it. Be careful though, because sometimes he'll get a second phone to avoid this situation. If you notice he's leaving the room to take calls, just be aware!
9. He's fidgeting a lot

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If he's fidgeting with his clothes or objects nearby when he's talking to you, it's a sign that he's nervous. Maybe he's looking too intently at a small stain or playing with a paper straw. Anything that seems like a nervous tick could be a sign that he's trying to cover something up!
10. He gets more demanding in the bedroom

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While some men might slow down on sex if they're having an affair or overcompensate, other men will find that their libido is increased. So if you notice your guy suddenly wants to try out new things in the bedroom and you're not sure where he learned them... this display of confidence may mean they've been unfaithful. He might also be more critical and demanding of you in bed.
11. He laughs when you try to have a serious convo

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When your partner is trying to avoid serious conversations by laughing or smiling, this is not a good sign. It can be a sign he's being untruthful or even cheating. He's trying to gaslight you into thinking that your thoughts or feelings are laughable. It shows a lack of interest in you and what you're saying, because he's preoccupied with something or someone else.
12. You notice a change in his voice

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When men and women are feeling sexy, you'll notice that their voices drop in town. The deeper sound means that they're feeling themselves! So if you notice your partner on the phone with someone, and he's speaking in a deep voice usually only reserved for you in the bedroom, it's time to be concerned!
13. He covers up his mouth when you're talking

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One of the biggest tells that someone is lying is when they place their hands over their lips. Maybe they're wanting to avoid answering your question or a problem that's come up, but they're typically doing this to buy time and figure out their next words. It could be their whole hand, just a finger or their entire closed fist coming up to the mouth before replying.
14. He stops talking to you about a particular person

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If your partner used to talk to you a lot about a work colleague or a gym buddy or a neighbor, and that stops suddenly, it's cause for alarm. When someone "vanishes" from his conversation, it's actually one of the most common signs of cheating. If you ask about that person and he deflects the conversation, then he's probably trying to throw you off track!
15. His responses feel very short

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People who are lying tend to speak less because they're worried about spilling the beans and getting themselves in trouble. So if you notice your guy is clamming up and giving you very generic and brief answers, maybe do a little digging. The same should be said if you notice him changing the subject a lot!
16. He suddenly seems younger

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It's common that men who cheat will say their new partner makes them feel young again. So if your man is suddenly taking interest in new movies, music, food or drinks, it might mean he's got a new person on the side. You'll pick up on it, because the interests will seem like they're trying to impress someone.
17. He faces away from you

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Similar to a man who's avoiding eye contact with you, if your partner is shifting his body away from you, it's definitely a red flag! When someone is being truthful and open, they will face you with an open stance. If they're turned away, it means they're trying to hide something from you! So get to the bottom of it!
18. He's stopped cuddling after sex

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Most healthy couples tend to cuddle or have cute after-play after they've had sex. Of course, some men and women don't have a strong preference for this. But if this is something you and your partner do and it suddenly stops, it's a huge sign something is up. Cuddling after sex developed a special sense of intimacy, and if they push you away, it means he might be feeling guilty!
19. A change in his bedtime routine

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This one is kind of interesting! If your guy usually sleeps naked (why do so many men love to sleep naked!), and all the sudden he's wearing pajamas to bed, this could be cause for concern. It could be two-fold in that he's putting away from you intimately, or that he's trying to hide love-bites, hickeys, or scratches from you.
20. He becomes overly animated in conversations

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Your guy might be a bit like this naturally. But if there's a sudden change in exaggerated expressions and gestures, it's a sign that he's trying to put on a show and get you to believe him. Keep your guard up and pay attention. He's trying to convince you of something, so watch his actions as much as his words!
21. He's taking a lot of showers

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This might sound kind of weird, and of course, everyone showers. But if your guy starts to shower the second he gets home and this isn't something he's done in the past, he might be cheating. Why? He's trying to make sure there's no evidence of another woman on him. So if he rushes to the shower without giving you a hug or greeting you... red flag!
22. You notice he's peacocking

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This is something that's kind of engrained in guys, and they'll do it without realizing it. But when a guy is displaying sexual flattery or interest, he will fsplay his chest or his legs - essentially opening himself up. This is considered alpha behavior that is in his nature whether he wants it to be or not!
23. He keeps his arms crossed

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This is another gesture that shows you this person is being closed off and not opening up to you in conversation. If he's lying, he may stand with his arms cross, showing potential guilt. This is considered a defensive stance that's used for protection or even self-soothing when they're feeling anxious or caught in a lie.
24. His words and actions don't align

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He probably won't even realize he's doing this. But if you ask him a yes or no question and the word he says doesn't match the motion his body makes, it's a good indication of lying. So you could ask if he's ever cheated on you, and make sure that his head movement and words align.
25. He absolutely rejects PDA

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Everyone has different comfortability levels when it comes to PDA. But most couples know those boundaries and have set them together. If you're a couple that loves to show affection and that suddenly stops, this should raise some red flags! Your partner could feel guilty or be trying to convince himself that your relationship is over, because he's cheating!
26. He hides his hands in his pockets

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As with a lot of these other signs, when he has his hands in his pocket while having a conversation, it's a symbol of him tucking away his emotions. This means there's stuff he doesn't want to share with you. Studies show that people who are telling the truth will often subconsciously show you their palms. So hiding the palms means hiding the truth!
27. He doesn't return your physical affection

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Have you ever gone in to hug or kiss your partner and they turn away from you or respond in an awkward manner? This could be a sign that he's cheating. Often, if he's avoiding physical contact, it's because he feels guilty about something he's done. It could also be that he's just no longer into you, which is just as bad :/ Also, look for changes in their affection. I.e. if your man always holds your hand in the car and then suddenly stops, it could be a sign.
28. He's generally giving you the cold shoulder

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Beyond just the physical affection, you may feel like your partner is giving you the cold shoulder. Women are pretty attuned to these types of changes in behavior, and it could be a reflection of his current state of mind. If he was a loving partner who now barely acknowledges you, then know he might be cheating!
29. There are negative cluster cues

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We've talked about these individually, but experts say that body language comes in cluster cues. If your partner is moving away from you, flinches at your touch, or turns his phone away from you when you come in close, these are considered negative cluster cues and could indicate something shady going on!
30. He's OVERLY affectionate

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Similar to the guy who's making way too much eye contact, if your man suddenly starts showering you with an overwhelming amount affection, it could be a sign he's cheating. If he's offering extra hugs and kisses, it might be too clear a guilty conscious. Basically, keep an eye out for any sudden shifts in behavior and body language, as it is a sign that something is off.