Left Wanting

Could have been
So much more
Isn't that the 
Refrain, when
You've closed the
Door? Beyond the 
Stoop, clearing the
Loop, futility's arrow
Struck my side; utility
Sparrow: singing my
Song: food and sleep
You won't leave me,
Will you? Fair, if you
can't stay, I couldn't avoid
Leaving myself, but I still
Sit here, wondering, what
Has been left behind
And whether I'm the
Same person as I was