Here's how the season should proceed, Serena and Nate somehow team up to help get Serena in Sage's good graces so that she can keep her relationship with Sage's dad. And then they have one of those moments where they hug each other cause they accomplished something and they should cheat with each other! Then Serena will be like this was a mistake Nate because she still has feelings for him and then he dumps Sage and pursues Serena and boom last episode ENDGAME along with CHAIR!!!
That would just be so wrong is Serena actually ended up with Sage's dad, and Nate ended up with Sage. Because then Serena would be Sage's step mom who dated her boyfriend, Nate. :L
Between Nate dating Diana or dating Sage, i can't tell which relationship was worse. I found it funny how both Serena and Dan commented on Nate's shirts.