Hi Lawssusan and welcome to SR :-)
Even tho he wont admit to his problems concerning alcohol, even refusing to see it,
it obviously has come to a point where he cannot help but express the torture, that
addiction to alcohol does, to some as it takes a serious hold.
I dont know the guy sure, but its possible that his outbursts and other negative vibes come as direct result of the alcohol dependencies early stages, and he has no power over it. So this is how he is feeling.
Id like to add here that i 'do not' intend to extend sympathy for him, or suggest he should recieve it elswhere either because that 'wont help' him or anyone else.
You have good advice already from exp' people, i suggest you take it, and leave him to fight this, 'his own battle'. He must apply himself to the help available, or (by the sounds) he will be in for a very difficult life, along with anyone connected to him, if he continues in denial.
Regards - Stimmed :-)