New goals for the first volume of seventh grade, page 35, 3A Runner eats well! Translation and imitation

There are too many and I only translated one article

Unit 2/sectionB/3a:

Dear Mary

I have one question, and I need your help. I always thought I was popular in school. But I just found out that my friends are planning a birthday party for my best friend and they didn't invite me, everyone else in my class was invited except me and I don't know why. What did i do wrong. I was very upset and didn't know what to do.

What are you thinking? Can you help me?

Your,

Lonely Child