Which line in this song from act ii, scene iii, of twelfth night illustrates that the song is about unrequited love?
clown:
song
come away, come away, death.
and in sad cypress let me be laid;
fly away, fly away, breath;
i am slain by a fair cruel maid.
my shroud of white, stuck all with yew,
o, prepare it!
my part of death no one so true
did share it.

not a flower, not a flower sweet,
on my black coffin let there be strown:
not a friend, not a friend greet
my poor corpse where my bones shall be thrown:
a thousand thousand sighs to save,
lay me, o, where
sad true lover never find my grave,
to weep there!