I'm currently going through pretty much the same situation with my AW of 20 years (10+ drinking). She is currently trying to get off of alcohol with the help of a councillor. I've come to realise over the last few weeks that she seems to view her life/family/friends as part of the whole addiction package. I fear our marriage will wont survive her battle.
It's really hard to handle the fact that me and the children have endured over a decade of pure hell for her to simply walk away once she feels 'cured'.