How can I deal with my feelings for an alcoholic? Does he even care? How do I move on?

I have feelings for my friend who is an alcoholic. We’ve been good friends for about half a year. Recently he started a relationship with someone who lives in another city. We are in a similar circle of friends, and he has brought her around, but when she isn’t around he is hanging off of me or around me. I try to extricate myself from him, but he pulls me back in. It’s like an addiction. Ultimately it makes me feel badly because he is with someone else, but then again, I don’t want to be in a relationship with an alcoholic anyways, and this girl doesn’t know him very well. I am needing some guidance on what to do, and am wondering if I should go to Al-Anon. I also wonder if he has feelings for me or not. Is this something alcoholics do often?