I think i love her? How can i win her back or get over her?

Two years ago i started talking to this girl, and there was a real connection between us. We started talking in february, and by the end of august she was one of my best friends. We were more than friends, but not in a relationship. We would always cuddle, kiss on the cheek, once kissed on the lips but she didn't want to go any further as she hadn't kissed anyone before. But it was very obvious that we had strong feelings towards each other. Our friends who we went out with at the time always told us that we should go out and we looked cute together. But we slowly drifted apart from each other after the august 2 years ago. We used to talk all day long, every day on bbm. But we started to talk once a day, then once every other day, etc.until it led to us hardly speaking. When we were hardly speaking, we still said hi and held small talk when we saw each other (which was most mornings on the bus to school) but eventually that stopped and we just ignored each other and listened to our music.

But about three months ago, during p.e (gym class) i had my iPhone on me, and gave it to my friend to hold as he wasn't doing football. But during this time he went on to my Facebook and started to speak to her, and eventually asked her to prom. He told me straight away, and i laughed it off and said something like i don't care. But on my way home, alone, i realised i want to go to prom with her (the answer to what my friend said was obviously a no, as it was strange asking after almost 2 years not speaking), so i started talking to her again over Facebook, and we started texting once we exchanged numbers. But these are the conversations which i missed and i realised my feelings were coming back. I have told her about my feelings and she said she thinks the time has passed and we should just be friends. I have tried everything to get her to fall for me again but nothing has worked. At parties i have got with other girls, and when I'm with them i seem to think i'm over girl 1.

Added (1). But after i'm finished with the other girls, i realise that i still have feelings for girl 1. I don't get on with her new guy friends, they're nerds and really boring + unfunny, but i get on with her girl-friends and i'm kinda close to about 2 of them. Every song about feelings i hear reminds me of her, especially how my sister has been playing Jason Derulo it girl and what if recently. I just want to love her and spend time with her. Can someone give me some advice of wining her back or getting over her.

I'm in this situation to, accept i'm the one who isn't in love with someone i used to be madly in love with but they still love me, and honestly don't pester her with it cuz itll get annoying and ull ruin your chances even more with her just slowly build it all back up and i'm sure it will come back to her eventualy

Just spend more time with her and make the old jokes you used to make together if you are taller than her then you may have more of a chance if your not you will still get there just remind her of the old days