I got involved with someone when I was in full alcoholic mode. I have no idea how that happened, I must be a really charming guy because I was at a pretty low point when we were first going out. She doesn't drink and I clung to her for dear life. If she drank, my path to recovery would have been a lot harder and I probably wouldn't be here. So I guess the point I'm trying to make is that it's really preferable if your prospective betrothed doesn't drink. If she/he does, I'd probably skip the relationship and wait for someone else.