Things were going so well for Dan and Blair by the end of this week's Gossip Girl, but looking ahead to next Monday, it appears there's another roadblock in their path. We just don't know exactly what.

Something's amiss, however, as evidenced by this new sneak preview from "It Girl, Interrupted." As you can see, an awkwardly nervous Blair is clearly trying to give Dan the runaround despite his overtures.

What's going on that she's not revealing to him? Something tells us those aren't song lyrics on the table. Is her sham marriage to Louis about to rear its ugly head again? Or does it go beyond that?

Check out the clip and share your theories with us below ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.