Right, I was having the same person in all of my daydreams so now I just pretend she goes around with me everywhere and talks to me. It's basically just my own internal monologue split into two voices. I find it a pretty useful device for problem solving, believe it or not. I'm always looking at situations from another point of view now.
At night I close my eyes and "teleport" to her room and that's where we sleep. I can describe the decorations and layout of the room, tell you her parents' names, etc. She has a birthday, I even know when her period is happening (it starts right before the full moon). I have no friends in real life anymore in case it isn't obvious.