Ok, seems like he is just an asshole...
Well, I wont try to decide which is best for you, but ill try to include all the viable options here. They are sorted by what i consider the riskiness and how much worth it they are imo.
The dreamer's path would be trying to get together with him again, even tho his parents are strongly against it. If you push enough both on him and his parents there is a chance it will work. You could also try to keep it a secret from them until you two are capable of living on your own. Also, even tho he probably hates you now, i am like 95% sure he did love you before. It shouldnt be that hard to convince HIM.
Basically high risk, high reward.
The lover's path would be trying to find a new boyfriend. It depends on how well you judge people and on your luck a lot, but if you get lucky, he would support you in the human's path and make you feel better about yourself in general. On the other hand, you might run into someone who will make it even worse. (Just a very general tip, guys who really try to make their hair look good, like have it gelled and stuff, are generally assholes.)
The hero's path would be to talk things out with him without backing out after he says he hates you or something like that and getting your life together yourself. In this case it would also probably help if you tried to get help from other people less, preferably staying with a smaller group of close friends or alone most of the time, trying to find and doing things you want to and have to do.
The human's path would be looking for things to fill his place. What
>>14 suggested, which would basically be a pretty safe way to gradually forget about him and get a new life with its own fun and interesting things. It will probably take a significant amount of time before you can move on tho.
The coward's path would be trying to ignore this all, change schools if possible and try to forget about him. Best combined with the human's path. Low risk, but might take a long time.
Also, a general tip for all kinds of depression would be to always force yourself to do stuff. You HAVE to do you homework, learn for exams, etc. You also HAVE to do things you like doing. Just, force yourself to do something. Ive learned the hard way that not doing anything is the worst thing someone can do when they are depressed.
And another question, what did he do to make you fall in love with him oh-so-madly?