Chapter 18 and Saturday, November 9 Summary

It's official, Jilly and Mark are a couple. He walks her to all of her classes and is late to his own classes. Mark talks about her all the time to Erin. The only consolation Erin has is that she knows Jilly's mom won't allow Jilly to go out on a real date because she is only 12 and three quarters.

At lunch, Rosie says he wonders where Mark is, but in a way that's asking if Erin knows where he is because Rosie definitely know. Erin says he's probably with Rosie. Then, Erin realizes Rosie knows Erin likes Mark. Erin admits everything to Rosie. Serena walks up to the table to tell Erin she told her so, but Serena looks like she is about to cry. Erin admits that Serena was right.

Rosie and Erin are on...