I had a different version of the "Everyone but me's an alien" belief. I did think there were other humans and I had to find them, but adults were "good aliens" who'd give me clues as to the humans' location, and the kids were "bad aliens," sent to misguide me and make things tougher.
A childhood belief about i'm different

others believed things like this
- When I was young, I used to wonder what if the animals turned into humans while the humans were away.— Kirk
- i thought aliens would come to earth year 2000 because of a commercial were an alien ate a hot dog— ulle
- I was convinced that children weren't humans, only adults were, children were a total different race!— Leda
- I used to believe that aliens would come and take me if I wasn't good to my parents— somebody
- i used to believe that eggs used to come from humans.Anon
- I used to believe that humans were a subspecies of sheep.Anon