My oldest son had a ghost friend many years ago. What I did was talk to my son and had my son ask question to his ghost friend. I would ask my son when he came around let me know and we will have a play date because mommy wants to be friends as well. It took a few times for his friend to be comfortable with me until I learned the truth. The little boy drowned in the swamp where our house was built, and he was alone and just wanted some to talk and play with until he found his family.