How do you make these poems into perfect iambic pentameter?

i actually wrote a death poem so imma just tell yall.

take a knife and cut me up

if you hate me then you wont stop

make me feel the pain within

as your slitting through my skin

makes me feel weaker as i bleed

for your mercy make me plead

hear me screaming in the dark

as you leave your painful mark

blood is running down my face

as my beauty you erase

trying to cut through my every vein

on your shirt your leaving stains

i wish you knew i didnt care

if you cut me everywhere

you can slit my skin apart

but you cant cut

through my broken heart.