In this picspam I'm going to compare the scenes where Chuck and Blair deny their feelings for each other. I think it's pretty obvious that the writers made the scenes so similar on purpose.
2x01 "Summer, Kind of Wonderful" & 2x07 "Chuck In Real Life"
2x01 "Summer, Kind Of Wonderful" & 2x23 "The Wrath Of Con"
EDIT: I took away the comments below each picture because after reading them again some of it just sounded silly. And besides the pictures describe the scenes pretty well.