How can i forget about scary movies?

as a little kid i hated seeing scary movies because after seeing them id imagine them being real. but now its a little different. im 16 now but when i was like 12 or 13 i saw a movie called "thirteen ghosts" and to me there were some scary memories i have from it. my scariest memory was when the phsycic(dennis) got killed. i mean if he was stabbed or something it'd be different but he was broken in half anf jumped with no way out and that was really sad. even thought he was happy at the end its a memory that sticks in my head.plus all of them are creepy looking. i mean seeing that movie made me afraid of spirits in every way possible. on MTV whenever id see the movie in the guild i'd get scared even if i dont watch the channel. and the images of the movie keep poopping into my head and i hate it soo much. let me put it this way, as i typed in the movies name just now, i got a little scared. what do i do. how do i get these damn memories outta my head pls ive dealt with this for like a year now