My Artistic Secret

I draw these crazy detailed worlds on the back of my notebook during class. It's like I'm escaping to a whole new universe where I can be anything and do anything. But whenever I look up, everyone stares at me. They think I'm just doodling or not paying attention. Do they notice how many hours I spend in there? Is it weird that I keep sketching these imaginary places instead of taking notes? Am I the only one who gets lost in their own drawings like this?