How do you know that your bf is cheating on you?

If you're a chick and you're worried about it, chances are he's doing it, so, skip the confrontation and just hire a relationship investigator. A good 90% of the time for women, and 70% of the time for guys, suspicions are often correct, however that leaves 30 to 10% chance, that you are just being paranoid, so you need proof. Private investigators in days past have gotten so many "I think my ____ is cheating on me" that, they just made it a business. There are agencies now, that especialize in catching people who cheat; its up to you whether you want to catch him with his pants down as the saying goes.

Ask him stright up. He should be able to tell you and if he doesn't then you know wher you'r relationship is. End it first. -Camri6