Hich lines from "I'm Not Thirteen Yet" best support the main lesson of this narrative?

Margaret and I wound up on the same team during a color war. We didn’t talk, but when our team won, she gave me a huge high five.
Sometimes I forgot about her being in the teenage club back at school, but I also wondered what would happen to our friendship in September.
Right away, Margaret was kneeling next to me. “Are you okay? Are you okay?” she asked.
From then on, I knew who my best friend was. She didn’t care what age I was, and never would.