Help this lady: My friend copies everything I do - but slags me off behind my back

I have a friend who copies every move I make, yet she criticises me to my face and to others.

She copies the way I dress, the way I decorate my place, the music I’m into and now she says she’s going to look into following the same career path.

I wouldn’t mind so much if she acknowledged that she admired me and wanted to be like me but, instead, she always puts me down and gossips about me to our friends.

I can only imagine that she’s unaware that she copies me so much or has deluded herself that she’s come up with all these interests herself.

I can’t fully axe her from my life because we have several mutual friends, but it’s driving me crazy to have such a mean person in my life.