Also, don't feel like you "have to go read your bible", unless you want to! Yes, reading a bible is always a good thing, if you have a belief system, if not, then it isn't for you. However, a bible isn't going to be able to "tell" you whom you can/can't be attracted to. You can learn lessons, such as a man and woman were created to be with one another, but physical attraction is more deep than what you know can/can't be "the right thing to do..." which would explain why even some christians cheat on their spouses; in the bible that would be committing adultry, however again, I am not for cheating, but it would certainly go to explain how physical attraction can over-step "the right thing to do."
again, don't feel like you have to be someone you aren't.