What do I do shes stealing my life!?!?

ok so i have this friend and ive known her for a long time and in the fifth grade not bragging but i was popular a lot of people talked to me and they would sometimes crowd around me and my friend wouldn't care but when we got to sixth grade for my THEATRE class i was making a drama and a love story about a girl who is a werewolf i pretended i was one too but told people after wards i was not crazy i was just trying to see how it would turn out i got a A+ on my play, in the play my name was Flow (wolf backwards) and my middle name is Aquamarine and i use aqua for short, also after that was over i started wearing a sweatshirt that was a gir sweatshirt (gir is a character from invader zim a tv show on nick) and i put my facebook profile picture as gir and im a scene girl so i changed my picture to a picture of me with scene hair andExtensions and dyed hair i like the pic very much, my friend had her facebook hacked so she made a new one with the name Flow Aqua and my profile picture she but the same interest as me and same favirote movies and tv shows and she put half of my pcitures on her facebook she took a picture of my dog and typed in the caption "LOOK AT MY DOG HES SUCH A CUTIE" i sent her a message about it on facebook she replied back "SHUT UP, U ALWAYS CONTROL MY LIFE AND I HATE IT JUST GET OUT OF MY LIFE U TWO FACED BITC*" i was nice on the message i mean i said nothing wrong atleast i dont think i was offensive in any way but what do i do?!!!!