Summary: Myrtle may not be sure what normal is anymore, but she's pretty sure Lilo still doesn't qualify.
When Myrtle is young, she's good at making friends, and keeping them. She's queen of her own little clique. She's forceful and confident and sometimes mean, yeah, but only to people she and the others had decided deserved it.
But she and her friends keep getting older, keep moving up in school, keep meeting new people. One day the girl known for making fun of people who are different realizes she's different. Most of her classmates are native; they have a shared heritage, culture, language. All Myrtle has is an absent father and a mother who tries way too hard. Eventually Myrtle realizes the downside of choosing friends just as likely as her to exclude someone for not fitting in.
She never quite recovers after that. It's not like she's a total social outcast, but she doesn't really fit in with most of the kids she knows. It doesn't help that she doesn't become less abrasive