When Friends Get In Fights

When I was at cross country last night my friend called me a brat and told me to shut up. When we got inside I told our coach but she didn't do anything about it. That really hurt my feelings that she would call me a brat and tell me to shut up. When we where running I told her that nobody liked her and that i wasn't her friend anymore and she got upset. Even though she called me that she didn't have the right to call me a brat or tell me to shut up when i told some that they could walk. Now all this has got me to quit the cross country team and not run in races. My friend also told me that I am the reason i am bringing the cross country team down.
                                         
                                                                      picture from here