Could Serena be any more frustrating this week? After accidentally leaking Blair's diary to Gossip Girl, Serena begs Gossip Girl to give it back in exchange for anything. Unfortunately, GG isn't exactly a sympathetic ear, and what ensues is all-out war between S and B. Once Blair kicks Serena out of the house (seriously, though, it's about time), Serena goes into full b*tch mode and manipulates Dan into sleeping with her. If that's not enough, she also tries to record the whole thing on her phone. It takes Dan all of two seconds to figure out what's going on and Serena's desperate professions of love are too little, too late. With no Dan and no Blair to turn to, Serena takes solace in her old BFF: hard drugs. As if her drug haze isn't enough, we're also treated to a cracked-out Serena letting some icky drug dealer get handsy with her on the train. Lovely.