Duet is about two lovers who love each other so much, but have to part because they both have their own career to pursue.
In order not to become each other's fetter in the way of pursuing their dreams, they decide to separate temporarily, and once they fulfill their dreams, they'll come back home to finish their mutual dream: to love each other and be together happily ever after, which is "the things we should have done." Here's my interpretation of the song: en.lineday.co/rachael-yamagata-duet-lyrics-meaning/
Duet is about two lovers who love each other so much, but have to part because they both have their own career to pursue. In order not to become each other's fetter in the way of pursuing their dreams, they decide to separate temporarily, and once they fulfill their dreams, they'll come back home to finish their mutual dream: to love each other and be together happily ever after, which is "the things we should have done." Here's my interpretation of the song: en.lineday.co/rachael-yamagata-duet-lyrics-meaning/