Absolutely TERRIFIED of ghosts?

it's childish, i know... But whenever I see like, a ghost video or a scary movie... I'll be turning on like, every light in the house... i'll run everywhere... and I can't get to sleep at night. I mean, i'm not scared of the dark or anything... i love the dark... the cool, serene comfort of blackness... It's just... I'm terrified of what's IN it....How can i get rid of my fear of ghosts? i believe in ghosts, so i don't know how to shake off my fear of them...