I'm an older guy, so let me give you some advice. If she'll cheat on him, she'll cheat on you. She's got low integrity to do what she done. - Break Up & Divorce.
If your girlfriend/boyfriend has been cheating on you, don't let their lies and Try to discover if your cheating bf/gf is truly repentant for what he/she has done.
So that's what makes a girl cheat on her boyfriend. What that means is that her cheating is mostly her fault because she's been mistrustful and dishonest, but also.
Evan your reply made me smile at a time where I'm on the verge of crying. My bf of 2 yrs just left me for a married woman. To top it off, he was incredibly rude to me.