please help

this is my pathetic desperate attempt to get a certain girl...

we started dating four months ago. she told me from the beginning there was another guy that she has been dating for a year on and off and that she would continue...it sounds like this db calls her whenever he needs a booty call but she really likes him. anyway, we had an amazing four months. we did a lot...but no sex. she slept over several times. her excuse was always that she cant handle having sex with two guys or just wasnt ready. last friday she told me that she wants to be friends. she said that she is attracted to me and loves hanging out with me. loves spending time with me. she really does want to continue to hang out...we are playing tennis this weekend and she is coming over to watch a movie. she told me that at this stage we should be fucking like horses. i reminded her that it was because of this other guy that we didnt have sex. she said that if she had liked me enough...and she really tried...then she would have done it.

the fact is she does really like spending time with me and she is attracted to me. i know...i have seen it. i need to know how to get her back. please help. this is what i think i did wrong...i was too nice. frankly i did whatever she wanted and had no self-confidence in front of her (normally i dont have this problem, but with this girl, i couldnt help it). what can i do to make her more sexually attracted to me? is there anything i should when we play tennis this weekend? should i stand her up? this girl is the nicest, sweetest girl i have ever met.