My husband was bothered for quite some time by my drinking, but "looked the other way" mostly as he doesn't like confrontation. It got to the point however, that he could no longer look the other way...he was worried about my health (and rightly so). He called the 800 number for alcoholics anonymous and asked advice on the best way to bring the subject up with me. They gave him tips, and told him the best way to go about it, and the things NOT to say etc.
He finally did confront me in a loving way, and I was not surprised...I knew it was coming because I could see myself it had gotten way out of hand.
It sounds as though your husband may already be thinking about the possibility he has a problem as well.
Anyway, good luck.