Absolutely nothing will help unless and until he decides he needs and wants to get clean and sober. It is only then that any help such as that provided by addition help centers will do him any good. Some, unfortunately, never get to that point. Some never decide that they need and want to get clean and sober. It is an addiction. The addict physically, and (usually) mentally and psychologically, needs the substance. Going through some addition center won't really change much until he decides that he needs and wants it.
Sooner or later, you are going to have to decide what is best for you and whoever else, family, friends, coworkers, are involved.