I second Hopeful's suggestion. When I left, I quietly packed up boxes of my irreplaceable stuff and took them to the home of an Al-Anon friend. I also made sure I had all my financial and other ducks in a row.
I wanted to be the one to leave, because one of the things he had done was to sign another lease on the house we could no longer afford because he lost his job. I had specifically told him not to but he did it anyway. I left him rent money for ONE month and told him he'd have to figure out what to do after that.
I went to stay at a cheapo motel for three days, just to give myself a chance to plan in peace. I then went to stay with my brother for a few days (not a comfortable situation but a necessity) while I found an apartment. I was out of my brother's within 4-5 days, had my own place, found help to move out my furniture (almost everything in the house was mine, but I left him enough to get by).
Best thing I ever did (next to getting sober).