I need help with my boyfriend.

I'm 16 he's 18, we have been together for 2 years. I've put up with alot of his stuff but i dont know if he loves me like i do him.

When i was 15 about 6 months after we started dating we were in an accident and after than it went down hill. He started cheating, got into drugs really bad. I use to think it was because of the lose in the accident but now im not sure. He has changed for the better and me but the thing is he's still kinda mean to me.

Would you say that he dont love me or is it just because he has alot of anger built up? PLease help if you can.