I had a few imaginary friend as a kid.
The first that I can remember was Hobbes. My dad read Calvin and Hobbes a lot, and I did too, so I got a lot of ideas. After a while I got tired of him so shoved him into the paper shredder.
I also had a friend named Emily. My mom told me she liked the name, so I made her the sister I never had. I can never remember what happened to her, but I think I ditched her for Lindsay Lohan (or Halley) after seeing the Parent Trap.
The last one is Carrie. When I was in like fourth grade, I watched Carrie at a sleepover. I wasn't afraid of it, but intrigued by it. I pretended she hadn't died, and instead I made her my friend. She talked to me whenever Chris Hargensen would give her crap. Then I had to accept the fact that she did die. Live on, Carrie. You were always my favorite.
A childhood belief about imaginary friends

others believed things like this
- My friend's mom told my friend's little sister thatI when a dog died, it went to a retirement home.— ellen
- I used to have an imaginary friend named Mr. Nobody. He would protect me from my imaginary enemy, Bad Elmer.— Kdees
- when my friend was little, she used to eat paper, thinking it would make her read better.— hehehe
- My friend Chris told me that when he was young, he thought that "elemeno" was the letter between k and p.— Jocelyn666
- When I was little, my dad had a friend named Scott. I thought my dad's friend was the king of Scotland— Uhhh....
- I remember once a friend of mine told me that when ever you hold in your pee it would make your balls stronger— Zao