I call these types of people Stalkerazis!! They do what ever they can to be like people that they feel connected with in some way. Even if that is a connection that doesn't really exist and they just want it to exist...so they attempt to like everything and go every where you go.
I got a little lost in your post about what the other issues were, other than this person adopting your behaviors, style choices, etc....but I would speak with them and let them know that you have noticed these things and that they bother you. Ask them if they are trying to be like you. Sometimes just having people bring it to there attention and tell them that it irritates you is enough to get them to stop.
Otherwise...tell her to stop raiding your closet and to get her own life.
__________________

|