Well, one of my boundaries with my stepson has always been that I will not spend time around him if he is drunk or high. I can only imagine that's a tough one if you are living with someone.
I'm sorry for the anxiety this causes you. Once I realized that no amount of my anxiety, anger, fear, pleading, etc. was going to change the outcome with my stepson, it was freeing to just let all that go. What? I can't control this? Really? Hated it so much!!!! At first...then I realized just how absolutely freeing it is to know, really know, that I was not responsible for anyone else's behavior.
When he comes home from work drunk, can you leave him some leftovers to heat up if he so chooses and go to the library for the evening? Perhaps there is a good movie playing at the local cinema you would like to see? Shoot, he's a big boy, he can figure out his own dinner, really.
I hope today is a better day!