The Invisible Boy

At a camp was a boy, nobody could see him. Then because of that he scared people and made them drop their food. He was always looking for a body to take though but he didn't find a nice one yet. Then one day he saw a boy with a girl that liked each other. He took the form of that boy and became a real-life boy then. That girl came that girl thought it was the same boy but it wasn't. Then the boy left and didn't even care about her. Then the boy lived in the woods and was there forever.