How would a GIRL know his MEN is cheating on her?

I think that when you notice really sudden changes with the man. I don't really know how to catch him doing it unless you invade his privacy but I don't recommend doing that either. Woman's instinct can start it all. But don't rely on it if you've been really paranoid even from the start. I guess that you have to catch him in the act or at least have some hard evidence. When you catch him, there's nothing left to do but let go. Because I believe that when your man cheated on you, he's got no respect left for you. And a relationship without respect will cause you, or even both of you lots of heartaches and may end too, somehow. Just save yourself from future, bigger pains because if he cheated, then he's not worth it.

You`ll know it. You`ll feel it. If you have confirmed that it`s true, talk to him dont end your relationship right away. ask him what made him do it.

Act abnormal, probably the guy suddenly treat the girl very good ie buy somehting she wanted long time ago, do whatever she asked him to do, because the guy feel guilty. One of the symptom is, very hard to get the guy on the phone. He is always engaged, and when you asked who call, he will answer, "my mom."

For me, There aer two ways to know that your guy is cheating on you. First is when she treats you cold like he is always feeling tired. Second is when she treats you really nice like he is doing something that you never thought he would do. You can feel it too, when your guy is doing something or hiding something to you. Just have a conversation or caught him in the act because no guy can tell that they cheat.