Hi Jen,
For me personally, I don't have problems being around alcohol. I used to, and even still, keep some in the house, I can go out to restaurants with friends who have a few drinks, etc.
I do however, have huge issues being around addiction. As soon as my radar starts picking up signs, my internal alarm systems goes beserk, all hands on deck, get the heck out of here. So for me personally, I have to remove myself from the situation or person as quickly as I can, so I can stay healthy. Easier said than done I know.