Well dan should kept his notes in his head but i would love for them to become friends that would been a good twist as no-one would saw that coming and i think blair hit the nail on the head with him, there lot thing we learnt about chuck i feel sorry for him and wish he didn't know , can you imagine how he feel about this, he thought he made a friend than find out he was using him and it's not one of his friend it's actually dan the most honest guy he know and i think he can't believe that dan could do that with him i'm surprised he wasn't impressed and i'm glad dan didn't write the story about chuck but he could write a story of how alone chuck is and what he feels. Jenny dropping out of school,the look on her father face was priceless.
As to friendship this is hard because it's difficult, of course you want your friends want each other to be best but we don't want our friends outshine us because it feel like you don't deserve to be their friend because they think they better than you, you want best friend same class of friendship , popularity contest can damage a friendship. when situation become where your friend spend more time other people than you, you feel like you are being replace. that my view on this. i think that how blair feel about it