I believe the song is about a failing relationship near its end. the second verse would seem to suggest that something once perfect and beautiful is dying "when our flower's fading" and when the foundations of that relationship crumble "When our stem begins to fold" it's time to call it a day and move on "like a bird that flees the cold" he also suggests he will do it civily "I will take off quitely"
I believe the song is about a failing relationship near its end. the second verse would seem to suggest that something once perfect and beautiful is dying "when our flower's fading" and when the foundations of that relationship crumble "When our stem begins to fold" it's time to call it a day and move on "like a bird that flees the cold" he also suggests he will do it civily "I will take off quitely"