Let him know the damage drinking does and if he cares enough hed stop. My guy was a huge drinker and I got him to cut down big time but when he started up again I gave him an ultimatem of me or the beer. And he chose me and fully stopped. Help him out and maybe you can look for a local aa meeting that you can attend and understand alcoholism is a disease and find ways to help him and maybe he can attend with you. Good luck!