Yes, I did have an imaginary friend when I was small. I have vague recollections (or they may just be based on what I was told by my parents). The friend's name was "Bucky Shadow" based on the folk song/rhyme, "Bobby Shaftoe went to sea, Silver buckles on his knee, He'll come back and marry me, Pretty Bobby Shaftoe" (or something like that). I was an only child at the time, and quite lonely for the company of other children. We lived in a suburb of Vancouver. One day I told my father he couldn't use the bathroom because "Bucky Shaftoe is on the toilet" (of course this story has had a long shelf-life).
Another time I followed a little boy home and recall being brought back in a police car. I apparently gave the little boy my new stocking cap, just to be his friend, I imagine. And I don't imagine my parents were too distressed about the given-away cap, although it seemed to come up quite a lot as I grew up. I remember that he had a maid who looked just like "Aunt Jemima" on the pancake package in that she was West Indian and had a kerchief like Aunt Jemima on. I can't remember how Bucky Shaftoe figures into that story, sorry.