
Bare ruin'd choirs, where late the sweet birds sang.
As after sunset fadeth in the west,
Which by and by black night doth take away,
Death's second self, that seals up all in rest.
It's a poignant photo and could be a metaphor for old age. Shakespeare's Sonnet 73, from which the above, comes, springs to mind because the sonnet's overarching theme of love is discussed, though this theme does not become apparent until the final couplet.
The speaker is not only requesting that the person they are addressing loves them regardless of their old age. They actually want them to embrace their old age.