Bulletproof Weeks Lyrics

Lyric discussion by supernovaslide 

Cover art for Bulletproof Weeks lyrics by Matt Nathanson

I think that when he says 'What happened to thinking the world was flat? What happened to that?' that he is talking about how sometimes when you are with someone in a relationship life can seem so simple and everything becomes idealised but now things have got a bit messy and he's thinking how stupid they wereto think like that... it feels like regret but with nostalgia...