Such a hard time

Have you ever felt like you made a huge mistake. Like such a small thing led into a big problem. Jen was gone for two weeks to celebrate her birthday in Disney Land. When she got back i told her i was going to play with Cassidy for one more day before i could hang out with her. Cassidy and Jen do NOT like each other. Jen threw a fit and told me she didn't want to be my friend any more because i wasn't playing with her. the next day i went to play with her but she was with Natalie and said i couldn't play. I've been trying to win her friendship again but it hasn't worked yet. Still im not giving in.