I began to hate my best friend 2 years ago
Why did you begin to hate your best friend 2 years ago?
He started drinking too much.
Your friend should deal with his drinking problem but you shouldn't hate him for having problems. Instead of hating him you should help him overcome his addiction.
I don't want to do that. I want to make him feel like shit for having a drinking problem.
That could be the worst thing you could do. If you hate him it might cause his problems to spiral even more out of control. He is already hurt and trying to hide that pain with alcohol.