I'm going to juvie tonight
You're going to juvie of your own volition?
I'm thinking about it because I really hate myself. I can just die now I'm thinking about it because I have no future
It sounds like you need help. You should seek out some professional help and talk to a trusted adult about your problems.
I don't want to hurt myself anymore I'm already dead inside, since I started skipping school in first grade because I'm a bad person... I'm so done now.
It's not to late to turn your life around and start feeling better about yourself. You just need help and support. You should talk to someone who can help you get the support that you need.