My DH is an alcoholic and has been sober for 16 months. He was also drinking every day but was never abusive towards me. In fact drink made him emotional and tearful mostly.
I never gave him an ultimatum. Things came to a head when he admitted to a friend of ours that he had a problem with alcohol. Following that, he tried to give up on his own by going cold turkey. We know now that this was a stupid and dangerous thing to do.
The GP referred my DH to an alcohol advisory service who told him that they could help him become a social drinker. This was a terrible, terrible time because my DH became convinced that he could continue to drink and things spiralled to a very difficult time for us.
Eventually his drinking became worse and we considered finding some sort of in house treatment for him. Luckily, the people that he'd met at AA previously were around to help and we managed to get him back to meetings.
This time my DH threw himself into AA meetings and is following the 12 step programme. It helped that he admitted to a problem and was committed to recovery. To an extent I was secondary to his recovery. He did it all alone.
Now, 16 months on, he has a sponsor and runs his own AA meeting once a week. Life has changed in quite a few ways. I'm no longer embarrassed by the inappropriate use of humour and the amount of alcohol consumed. He has lost weight and has far more pride in himself and his appearance. He is better company, and rarely falls asleep on the sofa. Oh, and he has stopped snoring! But we are also closer now than we have ever been His alcoholism has made us stronger but not complacent. He still takes ADs but is working with his GP to drop his dose.
Your DH can beat it but he needs to admit that he has a problem and want to stop drinking. Otherwise nothing will change and will only get worse.