<P> At midnight, Serena and Dan kiss and some old feelings reignite . Blair and Louis kiss and Chuck sees them . Blair notices and instantly feels guilty . </P> <P> Serena goes to see Nate and tells him she's going to go through her tips that were e-mailed to her and somehow publish them in a positive way . </P> <P> Lily decides to take the private investigator off the Charlie case . </P> <P> Blair goes to Chuck and tells him that he is an amazing person and she hopes that her marrying Louis doesn't ruin that . He asks for a reason why she doesn't love him anymore . She tells him that he will never know and they will never be together . He tells her he's going to find out why she's no longer in love with her . She tells him, "Just because we can't be together doesn't mean I don't love you" and he remembers that night in the hospital . </P>

What is the truth between blair and dan