I feel my best friend is polar. That is I am sure of it. I want to know how do I handle her mood swings and not allow it to control my moods. Also, we are room mates and I m wondering how she s able to hide it from others if this is her problem. She can be being so mean to me and then answer the phone or door and completely change her personality. Help. She s 74 and will have to live alone if we don t remedy this somehow because if I go she always gets robbed by her own children who are grown , spoiled , lazy , greedy substance abusers.