Totally Unspoiled Predication: Eventually, Katherine's going to have to come back, and eventually, Damon's going to have to be the one to kill her. It's the only way he's going to grow as much as he'll need to, in order to stay in the good graces of Elena and company.
MFHS; Interior: The young ladies of the Founders Court and their escorts practice dancing to Strauss's "On the Beautiful Blue Danube." If you only recognize one waltz -- that's the one. The partners begin their dance not touching. When Stefan and Elena break that rule, Mama Mulva stops them. "There's no touching during this part. It's about the simple intimacy of the near-touch." Stefan thinks the near-touch is overrated, but Damon will prove him wrong later. Don't you worry.
Caroline shows up for practice late. Bonnie's filling in for Matt, and listening more attentively than he would to Caroline's deep desire to win the Miss Mystic title. She figures none of the other girls are competition, but that she'll lose to Elena anyhow, because of the sympathy vote. She then remembers that Bonnie has just suffered a loss, and falls all over herself apologizing, but Bonnie understands. As she follows Caroline into rehearsal, I wonder, for a moment, if Bonnie is putting some kind of (good) hex on Caroline, so that she'll win the title, but if she is, she stops when she spies Elena and Stefan. When they greet her, she stands before them, silently. Finally, Elena asks to speak to her alone. Bonnie says there's not enough time, they have to practice, but Elena insists it will only take one minute.
Out in the hall, Elena wants to know what's wrong, but Bonnie tells her it's not worth talking about. Elena: "Is it Stefan?" In a word? Yep. Bonnie blames Stefan (who, I'll point out, tried to get Elena and the Bennett women to sit tight in Second-Sight Shack) and (more realistically) Damon. There's nothing Elena can do to make it better. Bonnie's not going to put her in a situation where she has to choose sides, but she is having a hard time with it all. Stefan is privy to the whole conversation, thanks to his super-hearing.