I hate my best friend
Why don't you like your best friend?
It appears everything is wrong with him, I can't pinpoint a specific reason.
It sounds like your friend is going through a difficult time right now. You should talk to your friend and try to find out what they need from you. Having supportive friendships can really be a help to someone who is struggling.
I don't need to speak to him.
You're right that you technically don't have to do anything you don't want to, but he's your best friend and it sounds like he needs support right now. I think you should really think about trying to be there for him so he feels supported.