I have always felt from time to time that people were watching me. It was really bad when I lived with my parents during child hood. I had even invented this kind of character, like I believed I knew what he looked like, and one day, I'd get that feeling, like I was being watched, and turn, and there he would be. Sometimes it would get so creepy that I'd go stand outside of the house and just watch the house. It went away when I moved to New York, but still sometimes I get it, more sense I moved into an actual house. I believe there are spirits in this house, I talk to them sometimes, just to not be scared of them. I feel that they have mainly gone away now. Anyhow, I definitely know how you feel. Is this a bipolar thing? A kind of paranoia, or an expression of bipolar paranoia? I don't know, this mind is the only one I've got, I don't know what normal is. :-/