A childhood belief about imaginary friends

When I was little, around 3 or 4, I met my imaginary friend Scooter. He was as tall as my thumb and would always sit on my hand and talk to me. When I moved from the lake into town around age 4 or 5, Scooter moved with me. He and his family lived under the sidewalk across the alley from my house but he would always come over and play with me. I think I had him until around the 4th or 5th grade. He wasn't around much through my school days, only when I was feeling lonely or left out. I would go into the bathroom and talk to him. He always made me feel better. I am starting to miss him after writing this.... :(