Maladaptive daydreaming is when individual daydreams or fantasizes as a psychological response to prior trauma or abuse. Basically an individual will immerse themselves in a fantasy world as a coping skill. Though it's not a recognized psychiatric condition. To cope with my loneliness I imagine myself surrounded by people are are talking to me and I respond back. Sometimes I'll get so caught up in the fantasy world I'll end up talking out loud. I've been caught talking to myself several times which led some people to think I'm schizophrenic.