Simon & Garfunkel - The Only Living Boy In New York Lyrics Meaning

I think this song is about disconnection, and bemused innocence in the entire process of disconnection. The main speaker in this song has lost his friend, and now is left only with himself, mired in the truth and purity of an realized human being, that is content in the sad truths of this life "Half the time were gone and we don't know where and we don't know where". A very touching song.