I cant stop thinking about her?

ok so this girl i really like a month ago told me she doesnt like me even though she had previously tole me she loved me. I really like her and she is me best friend in the world. She said she just wants to be friends cause she considers me her best friend or watever. Innitially I thought this was just a nice way of getting rid of me but after a while i realised its true. She texts me like 100+ times a day, we talk for hours at a time on the phone and we always go out alotand she even comes to were we work when shes not on to see me. Also she just recently put on her myspace page im the most amazing person shes ever met and she never whats to lose me wtf . I just dont get her like i really like her and its almost impossible to get over her when we spend so much time together. But i really dont think just friends kinda relationships are like what we have its like more then friendship i dont no i dont think anyone talks to someone whos just their friend this much. What should i do i really like her but i cant take seeing her any more its just to hard bbuts shes my best friend and i love hangin with her please help me 10 points for a good answer:) were both 16btw but im in grade ten and shes in grade 11 at a different school