The Carrie Diaries Chapter 18

Carrie is given a chance to write for the school paper, but can only think of one thing to write about: Donna LaDonna. After two suggestions she decides to write about cliques, and how they can make you or break you. One afternoon while talking to Sebastian, he mentions something about seeing Walt somewhere, but he didn't want to talk about it, and wouldn't say anything more on the subject. Carrie, not only being curious about Walt but also worried about Sebastian and Lila spending so much time, goes with Sebastian to the mall, even though she should be working on her piece for the paper. At a school assembly it is announced about Carries article, all of her friends congratulate her except for Lila, who's been acting strange lately. Could it have something to do Sabastian?