I didn't read the original post - but seeing this really pulls at me.
I'm the adult child of what is called a "dry" alchol abuser. It's different from what you think of as an alchoholic. My dad can go months and months and months without touching alcohol. He doesn't crave it, he doesn't have "withdrawal" symptoms. What happens is A) He has no self-control to say NO when people invite him for drinks and B) He can't STOP drinking when he starts.
My mother was never strong enough to do what she now knows she should have done years ago. I'm not saying divorce the man, but I would at least separate until he gets some intense therapy. If he is like my dad, it's not enough for him to just say "I'll do better." Because trust me, he will "do better" for a few months and the next thing you know you're crying because he's out drinking again and your 12 year old daughter is asking where Dad is and why your upset. Then he comes home and pukes on the wall. Wonderful.
My Dad has plenty of expired DUIs under his belt, and a number of "forgived" ones too.
It tears families apart - trust me. I'm 24 years old and still dealing with it. I believe in the sanctity of marriage, but alcoholics and alcohol abusers can KILL people. It's a disease and he needs help. Protect yourself - you don't have to divorce him - but maybe a separation or even an intervention.
Just don't do nothing - please. Doing nothing just hurts people.