Best Friend..Please Help!!

well i have been best friends with a girl for 3 years almost, but i have known her a lot longer than that.
we used to be completely different and into totally differnt clothes, music etc..but now it seems like she has changed her style to exactly the same as mine!!
and its like she always has to be centre of attention, we are in a group of eight, and she always seems to be in the middle of everything, and any opertunity she gets she pushes me out! when its just the two of us its great, we have a laugh and a really good time, but i feel that i cant trust her with any of my secrets..
i do like her but she annoys me sooo much!!!!
What should i do??? Please help!!! xxx

i agree with Ashley.you should confront her, either way friends dont treat you like dirt. and you're not her back up door mat so confront her and be all "what the hell???"