You know Courtney, if its a big deal to you then, it is what it is. I dont think that its healthy for a man in his 30's to be drinking every night, and even if its just a few, its a habit. Maybe not an addiction, but I would challenge him to argue that it wasnt a habit- not you literally challenging him of course.
And if he is coming into your home, then you shouldnt be uncomfortable asking him to not drink, or drink less. Maybe if he asks you to pick up a 6 pack and you dont want to say no, just get him a single beer.
Maybe that could be one of your boundaries!
I guess I gave the wrong finger to the wrong man...
