My depression...

I can not sleep
I stay up all night
Thinking 'bout my self
The one I fight

I laugh outside
Tho trapped in a cone
I walk surounded
Yet feel alone

I show my shell
To make up a sound
Don't dare show the truth
To those around

The emptiness
Don't know what I feel
I might be angry
But I'm not steel

I feel, I do
I'm just not sure what
I'm an empty void
Filled with a lot