I'm still very much in love with my ex-boyfriend and I'm not sure what to

[LCGirl]

do.... I need your educated opinions? I'm going to make this short, my ex and I have been going in circles for almost three years. We've gotten back together and broken up twice. We've each dated others during the split but he never stopped calling, texting, coming to see me. Well as I said before we've broken up again for the second time. He continuously questions me about the details of the guys I've dated... I can't bare to ask him what's happened while we were apart because I really just don't want to know! I know I'll get upset once he tells me so I just prefer not to ask. I don't get why he wants to know so badly. Then after I answer all of his questions, he gets angry and starts calling me names and just basically making me feel very very terrible about myself. I told him if he hates me so much stop calling me! Well..... he doesn't. He continues to call and text. I've tried ignoring him. Truth is, I'm in love with him and I can't let go. I have a feeling there is someone else in his life.. I just don't understand why I can't just let him go. Why can't he let me go.... That's the so-called short version. I need advice, I'm so lost.