Yea, I feel for ya man. I have been in a relationship where I thought she may be the one....didn't work out.....got back together.....still didn't work out. Lucky for me her and I are still friendly, but it hasn't always been that way. There was a period when she lashed out at me pretty badly.
I know you've heard it a thousand times, but things will end up the way they are supposed to.
I know how if feels to be head over heels in love with someone that you can't have. Either this chick will realize that she currently with some guy that's a tool, and come to you (like what happened to me

), or you will find someone else that will cram herself into the gaping hole in your heart.
Until either of those things happen, take some time to chill, do what relaxes you (go out for a nice drive or something), and try to enjoy the single life.
- Justin