In this sad scene from Episode 10, "Hi, Society," Serena's grandmother is a total bitch to Dan, telling him he will never be part of their world. Poor Lonely Boy. But don't worry - he will have his revenge in the end.
Carter: Nate. Look, I was hoping to see you, I wanted to apologize, put the past behind the past. Nate: You don't get to say what goes on here. I'm on to you.