How to Tell if Someone is Cheating on You

The signs are there that your significant other may be cheating on you, but sometimes you don’t want to see them. These are the 19 red flags you should not be ignoring. Yes, even that one. Consider yourselves warned.

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Suddenly becomes a fan of the gym

Maybe your partner had a sudden spark of inspiration and realized it was time to get real and start hitting the gym. But it could also mean your S.O. has someone to impress who isn't you.

sign of cheating: starts dressing better

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Starts dressing better

If she's gone from baggy tees, yoga capris and flip-flops — to which you've become accustomed over the years — to sexier tops, figure-hugging dresses and shoes cobbled by an actual designer, it might be that she's trying to catch the eye of someone who isn't used to her lounge-around-the-house outfits.

It may not signal the end. Check out these celebrities who survived cheating and stayed together.

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Their cellphone is glued to them

freaks out if i go near his phone? sign of cheating

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The cellphone freakout

putting a password on his phone? sign of cheating

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Everything is password-protected

It's one thing to actually protect your phone for security reasons, or ensure that no one eats up your five precious Candy Crush lives, but if he or she suddenly starts doing it when they previously didn't care and refuses to let you in on the password, beware.

if your partner showers when he gets home is it a sign of cheating

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Showers right away

Granted, if he just came from the gym or played some sweat-heavy sport, by all means, shower away. But it's when he is "stuck at work" for 14 hours after a long day of meetings that went into the night and doesn't want you to smell the alcohol on his breath and the perfumey scent that isn't yours wafting from his shirt — then that's a problem.

Need more info on the signs you should watch out for? Don't miss 10 secrets your cheating spouse is keeping from you.

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Gets defensive for no reason

why did his taste in music change? sign of cheating

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Taste in music changes

Sure, musical tastes can change as we grow and evolve, but when she suddenly develops a passion for jazz and doesn't share it with you, that's a sign that her new love for Miles Davis may be influenced by someone new.

Learn how to spot more red flags with our list of the top 10 reasons why marriages fail.

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Shows up on your friend’s Tinder

Well, duh. Discovering he's cheating with a friend? That's when things can get really ugly, like these 22 messy celebrity breakups that go down in history.

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Phone content is a mystery

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Dead giveaways

if your partner tries new sex positions? sign of cheating

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Getting wild in the sack

If he was a former missionary man and is keen on trying different things, watch out. Yes, he might have been reading a book on "101 ways to please your wife," but he also might have picked up a few tricks from his new mistress that he wants to sample on you. When his sexy time interests start to vary, it could very well be because things are heating up somewhere else.

Were you previously experiencing any loss of intimacy? See the top 10 reasons why people fall out of love.

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Always ready with an excuse

signs of a cheater: jittery about finances.

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Jittery about finances

If you notice a significant chunk of money missing from your joint account, or there's a new bank app on the computer that isn't from the branch you know your partner uses, and you ask about it and they change the subject? Question that.