A childhood belief about imaginary friends

When I was little (4-7) I used to have an imaginary friend, named Missy. I used to "play" outside for hours, pushing an empty swing and/or playing tag with nobody. I also used to have conversations with Missy all the time, in my room.

Anyway, the day I was moving I got really upset because I thought that I had to leave Missy back in my old home.

Before I moved I used to talk about Missy to my parents and to all my friends.

Then when I was about 10 or 11, my dad told me that my old house was haunted, and they thought that when I talked about Missy I was actually talking about something that walked around my room at night. Of course he would never tell me this when I was younger so I wouldn't freak out.

The thing is I don't know to this day if my dad told the truth or just being yah know..........A DAD.