I am 32 years old, and I am kind of facing the issue of fantasy in my head and mind deconcentration. Whenever I am busy or in social gathering most of the time I am fine. But when I am alone, walking alone and traveling alone, my mind goes into the fantasy. I kind of see this thing becoming common in people and while observing them I noticed that whenever I am in this situation my body is at rest while facial expression is changing according to what I am thinking. As I watched a lot of fantasies movies and seasons, my mind keeps stuck in these, thinking about different scenarios along with facial expression like smiling, anger, etc. It is kind of embarrassing when someone notices me. I would like to know what it is. People are saying it as daydreaming. My question is whether it is really daydreaming, or if not what it is? How can I overcome it?