It is so sad. We had alcholism in our family as well.
Even though we loved them dearly, it was impossible to communicate and the sad thing is if they don't want to help themselves 100% they will not change.
The lad in our family said he wanted to help himself, they put him in hospital and he escaped and went straight to the pub. In the end he drank himself to death.
It is a shocking disease, hurts every one around them and all I can say, even though it will be hard for you go in another direction.