I broke up with my boyfriend and I miss him alot....and he sorta hates me now. Do I still have a chance?

I really hurt him. He cried a whole lot. He has really hard feelings. When i realized i missed him he didn't wanna talk to me so I went crazy. I bothered him and kept telling him how i feel. He didn't wanna have anything to do with me. He got another girlfriend now that's like older then him... pretty fked up. BUT, I started back to talking to my ex that he hates... now he hates me..he's telling me to fk off... leave him the fk alone and all of this, he's just being very very harsh. He's blocking me from every online communication that I had with him.... even his number. I don't see why he cares that I'm talking to my ex sense he has a gf and it doesn't matter. He still asks me about my business but if I ask him about his he tells me not to ask. Wtf is wrong with him.... sigh. I don't even know why I still love him if he just doesn't give a damn about me. But I've been with him SOOOOOOOOOOO long man. A whole year.. his girlfriend contacted me and asked me nicely to leave him alone, we had a talk. I didn't curse her out or anything we were both being reasonable.. she doesn't even know him like I know him... but whatever it's not about her. Why does he all of a sudden hate me? After I broke up with him .. he said that we could take a break from eachother for a few days and we set a date to when we'll talk again and that's when he'll tell me weather he wants to be with me or not...... but he had found a GF b4 that day... sigh.. thats hurts so bad. It's like he just threw away our deal when he found her. He has no idea how I feel...... :( It hurts so bad I'm trying to get over it. As of right now he hates me bc he thinks I'm still talking to my ex but I am not.. Is there ANY chance that he'll want me back?