What does Diana announce to Dan in Act 2, Scene 13?

In Act 2, Scene 13, Dan, alone, watches as Diana arrives with packed suitcases and announces that she's leaving ("So Anyway," a quiet ballad). She explains that she wants to face her fear and her grief alone. Gabe enters, and she sings to both of them that she loved them once and loves them still, but it's time for her to go.