Why is my friend copying me?

Okayy heres thaa deal. My friend for about 6 0r 7 months now. used to have her own style, own personality, own looks. but maybe a couple months into our friendship i started to notice something. I noticed that when i look at her i see myself. When i dyed my hair blonde on top, black on bottom, she dyed her hair thaa same a couple days later. I also noticed that she is starting to talk like me too. also she is starting to act like me. my personality is a "dont mess with me " kind of thing also im a girl thats very random and loves to have fun. i never seen her act like that before when me && her werent friends but now she is. also i went to a store bought a new sweater && cami shirt. && a couple days later she bought thaa same exzact things after i told her where i got them and where i found them because she really wanted to know for some reason. also i noticed that she is doing her make up thaa same as mine and she has everything thaa same as me, even her room is like mine now. i am just really getting annoyed by this. i am honored that she looks up tahh me and stuff but enough is enough!! how should i go with this situation???