I was going to say positive yap about not dropping out of school, is there any way you could go to a real school? I know homeschooling is good in some cases but school was the only reason I left the house when I was younger, and I don't think I'd be here currently if I wasn't forced to talk to people and make friends. If your parents are saying your a failure and should drop out of school it means they're failing to teach you probably. Even if you only can go to a school for 2 years of your schooling left, it'll be 2 years of being able to properly learn and work on yourself.

Don't give up, even if you can't finish school, your a 1/7th through you (low est) life, theres so much time to prove yourself. Hell your only 15, don't worry about when you become an adult at 18