I think you know the answer to this question already, you just want confirmation, so here it is. If he has a g/f and he wants you also.......if he gets you back....is he going to do the same thing to you as he's doing right now to his current g/f? Yep, he will. It's easy for me to say and I know tough for you to do, but I don't think these are the qualities in a guy you want or deserve.