I have a similar issue. I've been enabling my wife for 8 years by buying her her several 18 packs of bud light per day -- she was too messed up to drive (especially considering her DUI and suspended license). For her, it's also a replacement for food (anorexia)
Recently, I worked up a serious alcoholism problem in just three months (benzos were involved) and then (despite a recent relapse), have decided to quit. It was killing me and everything I love. I can't be around her, her beer, or her alcoholic behavior; my only solution was to leave the situation. After my first detox she told me "I liked you better when you drank". Of course she did -- when I drank, I liked her better when she was drunk.
Eventually I plan on asking her for therapy. Divorce might be necessary -- after all, I only have one life and she's making her own decisions. I can't force her into therapy or detox, although I've asked.
It's a tricky situation.