IIN to have a imaginary friend who haunts you 99.9% of the time?

i have a slightly different situation, mine is a dragon-dog thing i created and drew constantly when i was younger.(i still draw him, i called him Sarge) it started out as a stuffed animal, and i just made a character out of it. but the character started to follow me around, and i could feel his imaginary presence BREATHING on me! i think i may have invited some sort of demon in my life. you know, even if i can't say anything that would help, its always nice to share a story, right?