Does your brother really hate you before[before he left]?
If it does, then don't be scared and have the courage to step up to talk to him and ask him why he hates you. You're brothers and sisters. And you're lucky you have a brother and he's back[although you said he's doing bad stuff].
But if your brother does not hate you before he left...
Then why are you scared? Just because your brother had gone 2 years ago does not mean he does not like you. He may adjust to his environment again, but he's your sister, right? Try to give him time to adjust with you.
Actually, I ran out of advice but you can ask me through comments and I hope I can help you with your problem.