Hi OP, I could have written your post.
We had a lot of conversations about drinking. Like you I drank too much wine but nothing compared to his intake.
When I said I was very seriously considering our future, and that drinking would finish us, he rang a sober friend to talk.
The friend came and took DH to and AA meeting the same day. It was amazing really, the support.
Anyway he went to meetings (not everyday) and reduced the intake. After about 2 weeks he stopped and is now on day 70 sober.
He's not religious, a big sceptic. He says the meetings are all about mutual support, that's it
His health conditions have improved (no longer needs blood pressure meds, for example).
He also has therapy weekly through work. This has been key.
He's different. More real. Present. Pensive. Reads in bed with me at night instead of being locked in the lounge with booze and TV.
I have a hugely reduced intake. I had a couple of glasses of wine last night. Won't drink tonight or for a couple of days and it'll be easy (I'd been drinking a bottle everyday for some months) I'd rather stop altogether and am working on it, I have mental health issues and want to feel better.
Take a bit of time to think it over. Then speak to him sober and tell him you need him to consider his drinking and your relationship.
Tell him you think his point may be valid, that if he can't address the boozing then you are likely to split up. And mean it. Not in a strident shouty way but simply, with your own conviction behind it.
You know that you can't stay with him drunk like this. You can't get him to stop. He needs to see that himself.
I feel so glad that DH has stopped. I know all the caveats about relapse etc, but he's taken action. It CAN change.
But, I'd reiterate that you think it all over and decide whether or not you will mean it when you say you think drinking will split you up. And discuss, definitely not as an ultimatum but as a real possibility if the drinking continues.
Good luck to you 