OK, since people keep asking me about one or another of my rules, I'm officially making a post of my various rules, in order of importance.
1] If a person is in a relationship when I meet him, and I meet him (or them) no less than 2 times thereafter, it is locked into my mind he is taken, and I will never be interested in him.
2] If a person is straight, or presumed to be straight (including, but not limited to, claiming to be straight, despite suspicions to the contrary), no interest will be spoken of, regardless of possibility. If the person in question isn't proven to be bisexual/gay within 3 months, all feelings which possibly exist are annulled.
3] If a person whom I am interested in is not interested in me, and states (openly or by intent) as such, a period of 13 days will begin. At the end of the 13 days, if feelings are still not returned, all feelings are annulled.
...There's more, but the rest are a bit more private. These are pretty much commonly known with some friends, but not everyone's known them.