My Dad stayed with my Mom
through all kinds of bad drinking spells. And he did that for five decades Firefighter, imagine that. He was always there for her, but it really took his toll on him. He had to make career choices that were not the ones he wanted to make, because of my Mother's alcoholism. Having lived through all this, you would think that I would have had the good sense to not marry a man who was a recovering alcoholic (who then relapsed)...but I didn't. Alas and alack, I am not known for my good sense.
It's hard to watch your spouse self-destruct with addiction. The best advice I can offer is to take care of yourself. Keep reading and posting on this board, find an Alanon meeting that works for you, whatever it takes to maintain your sanity and serenity.
Peace,
Gabe