My boyfriend of 14 months are 4 years difference, I trust him a lot but last week he admitted he had sex while away at college 1 time and called it a "mistake" but he was also texting my coworker like a month ago (started sliding up on her snapchats in December) and when we talked about it he said he was "just high" and it ment nothing . I'm not yound and dumb I do truly love him . But should I stay or leave. Also he just said tonight that he's done having sex for awhile???? Of course it's not all about sex but its sudden and I dont know why . Pls help . Ask more questions for more info idk what to do