christ, i always do this. it's happened with a straight guy (me being a gay guy) and a guy who lives on the other side of the world. much as i'd like to convince myself that there's no point even thinking about them, i pretty much can't.
Inaccessible is better than ill-advised. Woman I love is bipolar...
Well, it's a well-known fact that people inaccessible to you often get bonus points. Because they are inaccessible. Which is totally stupid.
I have a similar problem. I always start to crush on the girls who are about to move across the country (2 occurrences), the girls who have never once even thought about romantic interests with a boy (3 occurrences), the girls who "can't open to anyone and will probably become an old maid". That last line came straight out of my ex-girlfriend's mouth, about two weeks before we broke up.