Character Analysis
At the beginning, Margie is unequivocally Evie's best friend for life. They've known each other ever since they were both little kids, and Margie always stands up for Evie, even when it means picking on other girls (which, for the record, isn't necessarily the same thing as standing up for someone).
But after everything that happens in Palm Beach, Evie comes home changed and can no longer be friends with Margie—she can't just sit around and gossip about adolescent crushes while ignoring the fact that Margie picks on some girls because they're Jewish. She doesn't want to be a part of that dynamic anymore, so Evie bounces from the friendship.