How to forget i used to be witched and possessed by the devil?

u know something i got everything people looking for i have money lots of money, car, good-job and i have my hommies they love me and i love em to death too but i dont feel like happy tho u mite see me laughing and joking but deep inside i wanna cry cos u know when u wanna forget but it jess more that u can not erase i used to say i ain't never regret anything and never will also i used to say past 's always behind but now my past ruining behind me it just a horrible story it was one of my best friends we have been friends for 9 yrs or even more but last few yrs he gone depressed and mentally ill became like someone else i ain't never seen b4 actually cos i used to love him i was trying to help him, but i was asking myself wat makes him like that i didn't know he used to read about black magic and he was so gung ho about this, and when i had a little conflict with him we jess Brock up, anyway it doesn't matter for me however we took a lot of pix together and i gave him a lot of gifts especially when he was ill and i didn't realize he's jess not the one i use to know he's not the same as b4, i started to feel ill no sleep no eat and i used to feel like i wanna break my laptop go outta the house and never come back and no reason why! after that i got some stupid messages on my cellphone like im not gonna leave u i gotta revenge blah blah blah until i went to him and i told him that im not easy plus my dad 's a big shot so u better stop other wise ima tell the police got that. he said no man it's not me how did u think of that? i said noway u won't never con me anymore. but now im confused he's jobless or u better say im his job nowadays however i feel better tho u know wat im saying the only thing i know now that i gotta forget but i dont know how! if i could have a shift-delete on in me i'd delete him out of my memory forever. " shady future all of us doesn't know wat might happen"