There was a book that I always took out of my elementary school library between 1975 and 1978. Although I do not have the title, what I recall is as follows:
The book is about witches and fairies. The little witch in the story never felt right with the other witches, they were mean. I think she used to see the fairies and wish she was one of them. The middle gets fuzzy but towards the end she discovers that when she was a baby she was caught in the witches web and that’s how she came to be with them. But she was really a fairy and was returned to them.
I know this is not much but at 47 years old I cannot put this story out of my mind. I have always been an avid reader and hope to find this book. It will haunt me otherwise.