My friend/enemy i have keeps copying me!!!! :(?

OK, so i have this friend/enemy and shes really annoying me! I'm known as the cute, punk girl in school. Everyone calls me Kitty.shes the nerd girl who is really weird and thinks I'm her friend! well like maybe if she wouldn't copy me it would be different! Well one day i was messing around like always..so i shook a table my friend was walking on to scare her ( I was just playing) and when i stop she comes over and does the same thing!! also i started wearing pink and all kinds of colored extensions, so the next day she wears a totally fake looking hot pink one! and then acts like shes all cool!!?? and in art one day, i say when i older, I'm gonna be an artist who travels the world. then she said "me too" to like everything from that until i was done...also in the beginning of the year she was such a girly girl! and i'm punkish, so now shes wearing stuff like that which realllyyy looks bad on her! Also i have LOVED avril lavinge since as long as i can remember! than i tell her suddenly shes like omg i love her too then spends the next week talking about it. she tries to be cute all the time!!! like how we were watching a panda movie in class, she said awwww everytime anything! i mean ANYTHING, happpened! i said it once, cuz the panda cub was cute,then she does it the whole rest of the period! also, i wore convers to school one day next day she wears the same convers!!! and i did a doodle in class and then she copied it saying it was her own! and i taught her to draw something and she posts it on facebook asking if u like wat she drew!? she didnt give me any credit at all!! I'm really trying not to be mean! its just shes so annoying....i dont even really consider her my friend anymore :( what should i do? please no mean comments. thanx ~ kitty <3 xo