THIPPY......regarding your question to me....about what you should say to him, now.....
I would say to just say nothing. Just drop the rope. If he asks you a question or permission.....Just tell him to use his own judgement---that you are too tired to be his warchdog, anymore.
It IS so hard to be the drinking police or in the mother role with another adult---watching, monitoring....setting "rules" (not the same as boundaries)......
LOL...in my particular situation....I found it so much easier to take care of toddlers than a drinking adult.....
Please understand that this is my suggestion.....but, of course, you will have to use your own judgement.....