omigosh what do i do

So you'll wait knowing that you were always second best? That's border line desperate right there. I'd suggest going out and finding someone else. If your paths cross that way in the future, so be it. But don't stand by like a dog when she's already heading the opposite direction.

Also sex is in many ways an important part of a relationship. Not to say that the entire relationship should be centered around sex, but sexual interaction is just a fact of life. Take the necessary precautions and don't cheat on her with a crack whore and you'll be fine.