As I cry at things that don't make sense

Coal is hot , the knife is sharp
This is my very favourite part !

The fog shall cover my footsteps
In time you'll forget their there .
The empty space may haunt you now
But one day someone will sit on my chair .
My scent shall linger gently
But the wind will blow it away .
You may hate me now for leaving you
But later you'll see
I only did it
Cause I cared