I don't have much useful to offer here - other than agreeing that it sounds as though he has a problem with drinking.
Problem is, whilst you're concerned about it, you're probably not the person to assist him right now. For you though, if you both decide to work on your M going forwards, this may be a non-negotiable area. He needs to recognise how problematic his use of alcohol has become and seek support.
Ultimately though, he's going to have to wake up to this and decide within himself to take action. If he does, there's plenty of support out there, and networks such as AA have regular meetings and make a big difference to people's lives.
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus