You.

Just to make it clear
The door is over there
You kicked me when I was down
Yelled at me to make me frown
Loved to see the tears roll down my face
Just waiting for me to break
You laughed at my broken heart
You laughed at my sorrows
You laughed at my pain
You were mad that I changed
That I grew up without the pain
No anger
No shame
That you put me through all this pain