Maybe there are clues or maybe it’s just a nagging, gut instinct. You might try not to think about it because every time it crosses your mind, it makes you feel sick. Here Are 10 Signs Your Man Might Be Cheating On You:
Unfortunately there is no guideline that tells you exactly how to tell if a guy is cheating on you. Unless you either catch him in the act or he confesses, you can’t know for sure.
#1 He Suddenly Cares About His Hygiene

You've known him sufficiently long to know how he ordinarily looks after himself. In the event that he takes a sudden enthusiasm for what he looks like, his physical well being, and even begins showering more, who is he endeavouring to inspire? (Is it safe to say that he was attempting to inspire you or another person?)
#2 He Lashes Out At You
#3 He Needs “His Privacy”

You thought he was alright with you find out about him and being near him, and all of a sudden he begins requiring increasingly time independent from anyone else. What might he be able to try and be doing with the greater part of that time alone? That may be a sign he's undermining you.
#4 He Avoids Getting Close To You

On the off chance that you see that your person all of a sudden maintains a strategic distance from closeness with you (or stops totally), that is a colossal warning. A few men who fear closeness will cheat to feel like regardless they have control over their sexual coexistence, and a few men cheat just in light of the fact that they need somebody "youthful and new"… Which prompts my next sign.
#5 He Goes Out More
#6 He Keeps Working Late
#7 He Is Using His Phone A Lot More (And Not For You)

In the event that he all of a sudden begins messaging all the more regularly, yet regardless he takes perpetually to answer to you… that might be an indication that he's bamboozling. It doesn't mean he is certainly undermining you. He could simply be having a critical discussion…