Stuck in a reminiscence; Dreaming of Cinderella

wrote the following:

what do i do? i like him. well i did. i liked him soo much i cried over him cuz i thought id never be with him. and then he finally started talking to  me. I was so happy that he simply acknowledged me, but it didn't stop there. Then he asked me out. It was seriously a cinderellla story.  I was the little geek that had had so many different personalities because she was insecure, and finally she was secure.... and the guy who had made her suffer for a year came on to me.  Now I keep hoping some part of me was left behind like cinderella's glass slipper for him to pick up and one day he'll come back looking for me.

 another problem... he doesn't have that far to look if he decides to because being a highschool student, we end up in 4 of my 6 classes together.  my school is huge... but noo we have to be in the same classes.  in the beginning of the school year i just wanted to cry everytime i saw him. I gave almost everything for him - some of the best friends i have ever had, my security because i never knew if i was right for him, my summer, and my phone bill.

This all would be fine really, if I hadn't messed it up.  In the beginning of school i trashed him like no other, maybe because i was heartbroken or maybe for another reason.  This started huge fights between us which ended all hope of us working out.  I gave up regretting things for a while, but this is one thing i think i will always regret.  I just need a time machine to turn it around and fix all those memories i have in my head of things i did wrong with him.  Or maybe i could have someone come and erase all of those memories that still make me smile so i can forget him

 i've tried to move on, but i can't get away from him. he's every where, literally.  is there a way to fix me? because if there is ill take any advice.

sincerely,

desperately dreaming of cinderella