<P> While having dinner together in the Humphrey's apartment, Serena tells Dan everything about Blair's current situation . Dan explains that even though Chuck is a jerk, he deserves to know about what's going on . Serena later visits Chuck at his hotel room, who informs her that Nate and Blair have already slept together . She confronts Blair over her dishonesty . Making a point by saying she took a public bullet getting the test for her . Eleanor expresses concern over Blair's recent attitude fearing that her bulimia may have resurfaced . Blair finally takes the test, and calls Serena to happily tell her she isn't pregnant . At school, Chuck tries to threaten her about exposing their tryst to Nate, to which Blair replies that he would never tell Nate since that would ruin their friendship, and that she no longer wants to be a part of his games . Chuck then sends a blast to Gossip Girl about Serena covering for Blair because "her sheets got rumpled by two guys in the same week". </P> <P> Meanwhile, Dan attempts to say a proper "I love you" by having a romantic picnic in the park, only to get derailed when Serena's English paper gets blown away . Everyone see the news about Blair when school lets out . Nate initially believes that it must be a lie, but Jenny, who overheard Serena's conversation with Dan the previous night, tells him the truth . Nate gets into a fight with Chuck over the whole thing, then tells Blair he wants nothing to do with her . She is quickly overthrown as the queen bee, with Jenny joining the popular group . Serena asks Dan if he told Jenny anything relating to Blair, so he says he wouldn't do something like that to her because he loves her . </P> <P> Confused over what to believe, Serena confides in Eric about whether or not to trust Dan . He explains that there were times where he listened to her conversations without knowing, and that she is apprehensive over Dan's "I love you" because of their mother's history with men . Blair is then shown going to see Chuck at a bar . She explains that he is the only person that wants to be around her now, and Chuck replies that he is no longer interested in her . Overcome by her recent troubles, Blair begs her mother to let her spend a semester in France . Serena goes to see Dan, and they both finally profess their love to each other . But their happiness is cut short when Serena discovers that Blair is going away . She races to see Blair before she gets on the plane, and convinces her to stay and fight for her life . </P> <Table> <Tr> <Td> </Td> <Td> This section is empty . You can help by adding to it . (March 2013) </Td> </Tr> </Table>

When does nate find out about chuck and blair