Personality Disorder

Photo Credit: Marco Bellucci

What type of disorder does a person have when they start trying to become you? I have a person that is trying to slowly become me. It is like they are obsessed with me. First started with cutting their hair like mine - then having it colored just like mine - to dressing like me.

This person makes comments about me to mutual people all the time. This person makes comments all the time to people how they want to look and be just like me. It is really starting to creep me out. Should I be worried about this person?