All of the talk about alcoholism is true to this point. But, unfortunately, most alcoholics don't decide to get help until something has forced them to evaluate their circumstances. Killing somebody, loosing somebody, both, and/or a court order. That's just been my experience.
IMO, he'll never get help unless HE WANTS TO; and I don't see that happening anytime soon. He doesn't think there is anything wrong with him. There will have to be a precipitous event in his personal life in order for Mr. Breakaway to seek treatment and change his ways.
BW, I'm praying that you'll find a way out of this and/or he'll get the help he needs.