I too mostly live inside my head and I daydream constantly, everyday. It's the only way I can get through these miserable days and escape my reality. Like others have said already though, while I'm actually daydreaming I find some small bit of respite when I stop the reality of my life crashes into me with great force and then I am hit with such sadness and anger and feelings of loss for what I'd hoped/tried for when I was younger and feelings of loss for what I felt and what I imagine myself and my life in my daydreams. It's stupid to feel loss for something that was only fantasy, but I do. But there's no way I could stop my daydreaming. I'd have nothing left if I don't have my imagination and my dreams, even though I know they are dreams that will never be realized...