How to get someone you know to stop copying you?

ok basically i have this person i know quite well and she's mutual to all my other friends and we both have blogs. Her blog is like more known than mine but i dont really mind, anyway she follows me and she seems to post things that i post that are really off topic, she is obsessed with like fashion and general crap but i am more interested in the realm of the unexplored mind (like the galaxy, art, photography) and theres this thing about hipsterism which i like to cl myself with which is involved with the triangle blah blah OK BASICALLY SHE POSTS THINGS THAT SHE WOULD NEVER USEALLY POST BUT WHAT I POST ALL THE TIME AND HER BLOG AS GRADUALLY STARTED TO LOOK JUST LIKE MINE, LIKE THE TYPE OF PICTURES I POST SUCH AS DEATH DEMONSTRATED IN ART AND PHOTOGRAPHY BUT IN A PLEASENT WAY WHERE AS SHE WOULD JUST POST THINGS OF WHAT SHE BOUGHT THAT DAY AND FASHION THINGS OUT OF VOGUE. BUT NOW SHE POSTS WHAT I LIKE AND MORE PEOPLE ARE STARTING TO FOLLOW HER AND IM JUST THERE LIKE. SOUND. AND SHE'S REALLY FAKING IT BUT EVERYONES JUST LIKE WOW I LOVE WHAT SHE POSTS SHE'S SO UNIQUE YEY. someone please help me. actually **** this im going to say it to her face. might give her a slap to make sure she gets the message cus i don't really think any of you guys would understand my situation. ta xxx