I'm only attracted to unavailable women
Why are you only attracted to unavailable women?
Because I don't have time for the ones who are available.
It's understandable to feel desire for someone that we can't have, especially if we are not prepared for a real relationship.  Just make sure that you are not acting on this desire, because it is wrong to break up a marriage or committed relationship.
I won't do anything, that's what it's all about. I can tell you, I've given it a shot...didn't turn out that great.
It's great that you realized this desire is not going to have the ideal ending. It's better to seek relations with people that are not committed elsewhere.