I have a cousin that lives really close to me. We used to be best cousin friends. Then a few years ago she has become really mean. Today in the morning she told me to wait for her because she needs to buy a birthday present for her friend. Normally after school I wait for her until 3:40 and if she is not back then I go home by myself. So I thought that would be the same for today. I left a 3:40 because she was not there in the classroom where I usually wait for her. When I went home, at 4:10 I saw that she gave me a message on my phone. We had a big conversation and she was being really mean, telling me that I need to say a sincere apology to her in person, that I'm the worst cousin ever and that if I don't wait for her tomorrow she will NEVER forgive me. While she was texting I was crying because she was being really mean. I also thought she was over-reacting just because I didn't wait for her after school (I done this several times before because she didn't come on time). She was being really bossy even though I'm 5 months older than her. And I'm afraid that if I tell someone she will be more mean to me. (I done that before and she was really mean!). What do I do?