How can I get my best friend back?

My best friend and I were best friends for 7 years. and I mean inseparable. she knows almost everything thing about me and I know almost everything about her. she has helped me a lot. I've lived with her before for like 5 months and then a year later I moved back in with her for like a month and I just couldn't take how she controlled me so I went out and stayed with a different friend just to get away for one night and I come back the next day and my sh*t is packed and she never wants to talk to me again. she deleted me off myspace we haven't talked for like 3 weeks when we used to talk everrrryyy day!! and she said its cause someone told her that I told people about something very personal about her and I didn't. she wont believe me. she acts like she doesn't care at all. and miss her a lot. all her friends are my friends and all my friends are hers and I've been just letting her take over. I've just been staying home doing almost nothing cause I don't want to be around her cause I hate drama.
oh and I forgot to mention that shes 18 and I'm 17. I don't know what to do. its killing me.

Eliminate the phrase, 'it's killing me'. It's not killing you, you're being a bit dramatic there...and you said what you thought about drama, right?

Call her up on her answering machine or voicemail and leave a short and sweet message such as, 'hey, it's me. I really appreciated your friendship and I'm very disappointed that gossip and bullcrap came between us. Nonetheless, I want you to know that I never said anything against you when you were such a good friend to me. I wish you luck and thank you so much for being a good friend to me.'

If she wants to hang on to her silly gossip and immaturity, you're a better person for moving on with your life. GOD, you don't want someone like that in your life anyway, right!?

Then leave it at that and find new friends. No true friend of mine would get sucked into such silliness without speaking with me frankly first. Filtering through friends from teenage years into adulthood is as common as the seasons. It's going to happen no matter what. If she was a cool, genuine person worth your friendship, she would not have so quickly cast you aside based on gossip.

Oh and the myspace friendship thing is all bull. Myspace is used as such a sick tool by youngsters these days.

You need to rock up on her doorstep and ask what the hell is going on. Tell her that she means a lot to you and you trust her more than anyone, and if she is going to believe someone else over her then you dont know you mean as much to her as she does to you! And to throw away 7 years of friendship over something so silly is really immature and you deserve to know exactly what happened!

The only thing you can do is going out with your friends again, and be and feel cheerful. This gives the best chance to make her your friend again.