Venus Flytrap

[Verse 1]
You could've left me on the street where I was standing
You could've followed me home into the dark
Broken down the door while I was lying on the floor
And ripped my precious body apart
A killer couldn't understand the madness
A killer couldn't even comprehend
The ways I want to bite your fucking head off
I get too close to even play pretend

[Chorus]
The knife behind my back is plastic
No I couldn't even hurt a fly
So who am I?

[Verse 2]
Real shame is blood and guts and еchoes
Real shame is hiding from your friеnds
And I just don't know where to put myself
If I can't be there in your hands
I would try anything to stop it
I'll try and teach myself to fight
I don't go down that easily
I'd look him dead in the eyes

[Chorus]
But he knows the knife behind my back is plastic
Believe me I know how to use it
I would do anything to feel it
Oh you know you could make me do it

So who am I?