Maybe he thinks he can run away and leave all the problems his alcoholism created behind him. I think he will find it will follow him. My F quit drinking years after he and my M got a D. Twenty years later he still had regrets of what might have been. He went through four or five other M's, none worked out. His problems were not all caused by my M, otherwise they would have ended with their D. In the few years before his death, he would ask about my M, referring to her by her pet name. She would ask me about him, saying if things had been different, they would have still been together. She was married to my SF till his death last year. So, apparently, if she could be M to one person for that long, the problems obviously were not all caused by her. Like with you and your H, those problems have been magnified in his mind, and the fault, to him, seems to fall greater on you.
I can only hope that the beer was just for his friend. Maybe his friend could have taken the beer home with him, knowing your H is an alcoholic, and that temptation is bad.
