Fly away ((little sparrow, why?))

Fly away, my little sparrow,
I suppose you're truly free..
my dear, if you need to,
you can leave from me

My darling, please don't cry,
and don't break your wings if you fall..
please, just don't forget me,
and all the things we saw

Fly away, my little sparrow,
I can't keep you here,
truly not amazing enough for your song,
not good enough to save you, dear