I can empathise with your situation. My mother is chronic. My dad stuck with her inspite of everything up until he died. His life was not a good one, he was to afraid to leave mum alone in the house for any length of time, so in a way, his last 20 years were spent as a baysitter.
A couple of things I try to remeber, that this was not my fault, and I can't fix it - though I tried hard enough. I also try to remember that my mother is a sick person, not a bad person. Being an alcoholic isn't a crime, it is an illness.
I suggest going to have a look at the friends and family forum, and perhaps going to an Alanon meeting. There you will find friends and family can be very badly affected by the alcoholic, and ways to deal with that so your own life can be healed.
All the best
