What episode of Gossip Girl (season 1, I think) does Rufus say this to Serena?

Rufus never said that to Serena, he said it to Vana. The episode was the 6th episode, Episode the handmaiden's tail. It was the episode where they had the ball, and the first episode vana was in. He said this because dan loved vana and she left, and that broke his heart! Hope I helped.