In the Mix, on the Books, and in the Freezer

Peter (Jake McDorman) and Dana (Analeigh Tipton) have shared one successful date but things take an awkward turn when Dana runs into Peter on a date with another woman. Amy (Jade Catta-Preta) rallies Dana to start dating other people and get a "mix" of her own. Now that the tables are turned, where does this leave things for Dana and Peter's relationship?