FarAway if you've come to the conclusion that his abuse of alcohol is affecting your life badly, even if 'only' at weekends, then you need to decide if you can live with it or not. Given my background, I decided that I could not go through what my mum did and I could not put my ds through it. My dad only ever paid lip service to changing, there was never any long and sustained effort to stay on the wagon.
I confronted dh a few times and he became angry and defensive, so for a time I didn't rock the boat as I hated the conflict. Then one evening I went out for a run, leaving ds with dh. When I returned it was clear he'd 'topped up' in my absence and I was so annoyed. There was me doing everything I could to be fit, healthy and provide a decent role model for our son while dh was getting quietly trolleyed - behind my back! I cannot explain how angry I was. I put ds to bed, I found his stash so I had evidence, confronted him, he got angry but I stuck to my guns. I said I wasn't going to back down, he had a problem and I wasn't sticking around any longer, I'd had enough and now I had proof. He said 'ok, you obviously hate me, let's divorce'. I very calmly responded 'you are deflecting. I love you so much. But I think you're right as I can't do this.' Calling his bluff and sticking to my guns worked. He sat outside and sobbed and sobbed. Eventually, he came in, broken, and admitted everything, said he was responsible for everything and nobody or nothing else. Said he loved me, loved ds and the thought of losing us was torture. He asked me to to give him a chance to prove he was willing to change. We did a lot of talking and crying together.
He sought help, enrolled in a proper programme and did what my dad never had done - proved sustained effort over a long period (it's now about 2 years). But part of the deal on my part was accepting there would be no cure and therefore it was highly likely there would be blips along the way. I had to decide if I could accept this from time to time or not. I've decided that providing he's sober for 99.9% of the time and continues to be honest with me and talk to me, seek continued help if and when he needs it and not revert into denial and old patterns, I would stick around. It's 'worked' for us - I know the signs, he knows I know the signs. We really are happier, and consistently happier, than we've been at any point in our 14 year relationship.
It's a horrible disease and I count myself lucky that dh has broken the pattern and recognised and admitted it. That's half the battle - wanting to change. But I'd be lying if I said that's the end of it. We both have to be extremely vigilant, every day, every week. And most importantly I've had to look after my own sanity first and foremost. I have to be honest with him too, all the time, whenever I have even the slightest doubt, concern or worry. I am honest with him that if I don't trust him it's with good reason and he has to accept that.