Final Ashes - Monster Skin

Knows the names I've buried for years.
I locked the door, I lost the key,
Now something else is wearing me.
Monsters can't pull me in; my face, your grin.
Monsters can't take control; you're the whole inside my soul.
Every time I tried to fight it,
It adapted to the pain; every chain I used to bind it only made it stronger again.
People say I'm changing slowly; maybe they're already late,
Maybe what they're talking to now is the thing I helped create.