Lin, welcome. Come post anytime. About the worst thing someone can do is isolate.
I have no real advice for you about your husband. Alcoholism is one tough addiction to break, I know, It took me years to even admit that I had a problem, much less do anything about it.
But I haven’t had a drink in a little over 7 years, so there is always hope.
Like I said, I don’t have much in the way of advice about your husband, but I do have an idea for you. Al-anon. It is a program and a community of women like you. Women, and a few guys that love an alcoholic. They understand exactly what you are going through.
http://www.al-anon.alateen.org/
Take a moment or two and look at what they have to offer. Like I said, the worst thing you can do is isolate.
Good luck
Richard