I once had a crush on my best friend, Heather, and we were girlfriend and boyfriend for a while...
then about 3 months later, on the phone, she broke up with me. I asked why, and she hung up... we haven't talked since; we no longer have any classes at school together this semester.
So, I say don't get hasty and be happy with what you have. I wish I had did that....
EDIT: I just read XiaolinDragon's post. the same thing happened to me before we we started dating, but with Heather's best friend. I told her, and she's sich a big mouth, she told the whole school, who then told Heather...