A possible concise summary is:
Olivia is a competitive and busy girl who lost her best friend Mabel after leaving her behind in a triathlon. Mabel becomes a bully and signs Olivia up for another triathlon, hoping to beat her. Olivia trains hard, but also reconnects with Pierre, her ballroom dance partner. During the race, Olivia trips and Mabel helps her up. They reconcile and become friends again. Olivia also kisses Pierre and realizes the value of relationships over winning.
Here are the key facts extracted from the text:
1. The narrator is a busy and competitive person who loves sports and ballroom dancing.
2. The narrator's former best friend is Mabel, who became a bully after the narrator left her behind in a triathlon.
3. Mabel signs up for the same triathlon as the narrator and trains hard to beat her.
4. The narrator tries to help Mabel during their training, but Mabel rejects her help.
5. Pierre is the narrator's ballroom dancing partner and friend, who tells her the truth about Mabel and her own behavior.
6. The narrator falls during the final segment of the triathlon and Mabel stops to help her up.
7. Mabel and the narrator reconcile and become best friends again.
8. The narrator kisses Pierre and realizes how lucky she is to have him and Mabel in her life.
I hope this helps. Do you have any other questions? 😊