serena and blair have had a falling out.what happened? i missed a HUGE chunk!

this was early on in the season, around episodes 2x04-2x06
a shortened version of what happened is this:
Chuck created this elaborate scheme to bring Serena back into power, kicking Blair off her throne as queen of the school. Then during her mother's fashion week show Blair purposefully tried to sabotage it because Serena was hanging out with this socialite Poppy and getting everyone's attention. Then they had this giant fight where Serena said that she was tired of not being herself so Blair would feel better. Then they both ended up at Yale (Serena only went to spite Blair) and the dean and everyone there loved Serena more than Blair, but they work out their issues by the end.
hope that helps :)

um....where are you? in GG 2x06? cause that's the only one where they're at Yale...and the only way to figure that one out is to watch 2x04-2x05. ;p