You'll never know what hit you

I will keep quiet 
You won't even know I'm here 
You won't suspect a thing 
You won't see me in the mirror 
But I crept into your heart 
You can't make me disappear 
Til I make you 

I made myself at home 
In the cobwebs and the lies 
I'm learning all your tricks 
I can hurt you from inside 
Oh I made myself a promise 
You would never see me cry 
Til I make you 

You'll never know what hit you 
Won't see me closing in 
I'm gonna make you suffer 
This hell you put me in 
I'm underneath your skin 
The devil within 
You'll never know what hit you 

I will be here 
When you think you're all alone 
Seeping through the cracks 
I'm the poison in your bones 
My love is your disease 
I won't let it set you free 
Til I break you 

I tried to be the lover to your nightmare 
Look what you made of me 
Now I'm the heavy burden that you can't bear 
Look what you made of me 
Look what you made of me 
I'll make you see 

You'll never know what hit you 
Won't see me closing in 
I'm gonna make you suffer 
This hell you put me in 
I'm underneath your skin 
The devil within 
You'll never know what hit you