I had a girl do that to me because I was going out with a guy she wanted. You should just talk to your boyfriend and ask him why she treating you like that. Tell him you don't deserve to be treated that way. Tell your boyfriend if he cared about you then he would treat you right and stop listening to your ex. If he wants to know the real you then let him find out. If he is going to let your ex perceive to the way he sees you then he isn't worth you time. If you need to talk then pm me.