Your subconscious is a better deconstructionist than you are.
The end of the song slyly references the poem On Stopping By Woods On a Snowy Evening:
Frost’s poem is a meditation on the attractiveness of death after a long life, tempered with the responsibility to meet one’s obligations before checking out. Simon and Garfunkle’s candy-coated pill is a meditation on the attractiveness of death in youth, (hence the change of time from evening to morning,) before such obligations tie you to the earth.
The image of falling snow in the Frost poem becomes drifting petals in the Simon & Garfunkle song.
You probably think that I’m pulling your leg, because the song is so obviously happy and carefree, and even contains the line “Life, I love you.” There’s a reason for that, too. Its title is properly The 59th Street Bridge Song, and it’s inspired by the short film On A Bridge, in which a young man joyfully leaps to his death from the 59th Street Bridge in NYC.