You are just a character in a movie. So am I. So are we all. You can argue that I’m wrong, that everything and everyone is real, but that argument is based on belief and no amount of belief can ever make the untrue true. The question is, what remains when belief is gone?
You believe you live in a single universe with billions of others like yourself, but you actually live in your own private universe-bubble and everything you see around you is the sensory screen on which your make-believe world is projected.