Locked in a birdcell

Locked in a birdcell,
Depressed by these walls
Of a self-made jail,
I can see the world.

My wings aren't broken
And I bet aren't weak.
On the door of the cell I'm knoking
But noone's there to free me.

I know the key is there,
Must be somewhere nearby.
Solitude is hard to bear,
And I want to fly.