Trapped in my own head

I wonder where my smile went,
The spark that once kept me alive,
The energy, the fire within,
Now just a flicker, hard to find.

I wonder when it all just changed,
When getting through the day
Became the only goal I have,
As all my strength fades away.

I keep on going, one step more,
But the weight is hard to bear.
All I want is to feel alive,
But I'm just trying to stay there.