Classmates in the change room
I'm afraid that until your friend recognizes his relationship with alcohol as a problem, you're unlikely to be able to do anything to help him.
I don't think you're right. And would you be able to leave your best friend in the lurch just because he can't talk about something or admit to something? Try to talk to him again, build his trust in you as a reliable person who will not judge. Of the solution methods, I can suggest inpatient rehab los Angeles. It is important that the treatment is supervised by experienced professionals, so rehab centers will be the best option.