Maladaptive daydreaming

Ever since I can remember, from a really early age, I’ve always had the habit of spending hours in a row lost in my own thoughts acting out fantasies and imaginary scenarios. When I was a kid and in my teens, I’d spend hours every day in my room, listening to my favorite playlists with headphones on, pacing around the room from one side to the other completely detached from the real world, imersed in whatever imaginary situation I was creating at the moment. My parents didn’t understand what the hell I was doing. Until today, as an adult, I find that the most relaxing thing I can do is just dissociate from the world and go inside my head. Does anyone else do this as well? Does this have anything to do with ADHD? Is this actually a thing? Am I completely insane or something?