I live in a small apt with a full time roommate that I get along with. They recently asked if a friend could stay on the couch for a while. As a nice guy I said yes. Within a week of her being there she has taken over the couch, took a spare key, helps herself to anything and everything. What can I do to get her to do her part. I've tried telling her to stop. Tried talking to her. She is one of those "feminazi, fat, ugly, complains about her weight but sits down and eats a big bag of chips because she is depressed" type girl. Any advice?