HELP. I feel like im losing my best friend.?

Well, ["X"] && I have been best friends for almost a year, we met during cheer try-outs, which were on March 29, 08. So Imagine how close me are. It used to be that we were inseparable, but now its completely different. Shes never excited to see me, its always "F", or "T", or "M". I feel like im lost. She never goes to my locker anymore, and we barely talk to one another these days. Shes stops telling me things and its all about those other girls. When i told here that our "friend-anniversary" was coming up... she didn't care, and that really hurt my feelings. I feel like Ive lost my only TRUE friend. Help?