Some things are black and white.

That dude wasn't ever yours, AND you HAVE a bf.

Sure your feelings got hurt, and like I said, I know it sucks, but you put yourself in that position by cheating on your bf in the first place.

Fact remains that girl didn't steal anything or anyone from you, and you're no better than her because just as she went behind your back, you've been going behind your boyfriend's..,