coping what others are doing and neglecting myself(?)

i dont really know how to put it in words, but, for example. i really love vampires, and i said i am one. my friend said "im a zombie, we're a zombie wnd vampire" and i felt "wrong"? but i suddenly wanted to be like her, even if im my own person? i copy the people around myself, i change every little thing about mysefl? it's hard to explain