You go by the name depression.

I knew you before,
You attacked me,
But I won.

Youve come back,
Think ive forgotten?
Your not in luck.

I remember.
The pain.
It was real.

As real as you,
But noone else saw it
Noone else knew.

Why have you come back?
Arnt you satisfied from before?
You think i forgot what you can do?

No i remember,
The scars are still there ,
Remind me every day.

You think ive forgotten,
About what youve done.
Just remember,

Last time I won.