There is this autistic kid at my school and I hate him so much.
Why would you have so much hate for him?
He gets so much attention just for being autistic and no one pays any attention to me, and I'm depressed.
It's okay to be frustrated, but autism is a serious condition and there is no reason for you to take out your anger on that student. This disabled kid is probably going through a hard time and you should try being nice to them. Perhaps your kindness will also help out with reducing your own depression.
I don't think I have depression.
I know it's hard to admit your depression. If you can't find it in yourself to alleviate your depression, seeking therapy can be very beneficial to you in that it would help you with your depression, but also help you to potentially change your views on autistic people.