I love him... but I know for sure that he HATES me :( What do I do?

Okayyy so first off I'm 16 and I've had a crush on this 18 y.o. guy for a good year now. I'm desperately in love with him but he isn't interested. My relations with this guy go way back to spring break of last year. We hooked up, and I instantly developed feelings for him. He was never interested in a relationship because he's just one of those guys who uses girls and doesn't care about their feelings. Sure people have told me I need to move on and I understand how much of a bad guy he is but It's nearing a year and I still have such strong feelings of obsession for him. He used to text me on weekends like "wanna hu" and such and I used to go along with it. I knew I was being used but he was just so persuasive and my feelings towards him are ridiculously hopeless. I would always hope he would ask me out. He's been in relationships here and there but they only last like a week but he never asked me out or anything.. anyway.. He slept over my house one weekend when my parents weren't home and he was my first. I knew it was wrong but we were both drunk and we said we would keep in touch and stuff. So one time he called me and we ended up doing it in his car and then I was ped on to his cousin, literally. Honestly, I know how gross it is and how much of a tool he is but I can honestly say I love him. We have so much in common I love everything about him and there's nothing I would change except for the fact that he hates me. I have no idea what happened but he recently stopped talking to me. I would catch up to him in the halls and try to chat him up but he would never be interested. I texted him once and he just said, "don't talk to me." It's been months since I've talked to him. I told his cousin to tell him that I miss him and his cousin told me that he doesn't miss me at all. I'm crushed. I'm deeply in love with this guy, ive tried so hard. And please don't tell me to move on because its so hard for me, ive tried everything. I need answers in how we can start talking again. He's not the one I can just sit down and talk with, he's such hard work. Please help me. I know I have a problem.