When I told a dream charachter that they were fictional and part of my dream they exploded.

Dream sharing is impossible. I'm sorry, but if someone contends that they had the same dream as you they are simply lying or are confused. Dreams happen inside your own mind and are experienced only by your own mind. There is no mysterious "force" of dreams or a "place" that you go to, its simply imagery created by your own mind for you own purposes. Dreamsharing can be easily disproved by the afformentioned method of writing down and remembering a password, providing it to the supposed dreamshared person in your dream, and then seeing if the person in the real world remembers it.