This is hard to explain. I don't hallucinate, however I have felt that people - either distorted versions of friends - or people I have not ever met, are in a room with me even though I can't see them. I also sometimes feel as if they're occupying a place in my head and watching me, or just sitting there. When I shut my eyes I can vividly see then where I think they will be, but I think that is my imagination that they are there. Then I open my eyes and even though I dont' see anyone in the room I still can't tell if the person is there or not.
I'm sorry this doesn't make much sense, I just wanted to know if anyone else has felt like this. My diagnosis is Bipolar 2 hence why I'm posting it here, I try to tell myself I have to be making it up but it's really hard to differentiate. By this I mean it feels real, that I can't be sure that someone isn't there.