This is Non-Sense

Damn, I'm crying right now. That moment when your best friend suddenly got angry with you and you don't know why. I'm still thinking if I have said something wrong. All i know is that i was asking something and kidding a little when she suddenly burst. Scolding me and blabbering hurtful words. All I can do is cry. I was really hurt. I mean it, I never thought that she could say those words to me. Blaming me for doing things and stuff. Is it really my fault if I can't promise to attend a band practice or something. My mom was worried sick last night because I went home very late and I was just all by myself. She was assuming that someone will walk me home, 'coz she was kinda used to it. She's really strict and I am really thankful that she's actually allowing me to go our band rehearsals. And I was thinking if this friend can understand that. Is it really my fault? Honestly, I told my mom earlier that we have a practice tomorrow and she was like, what time are you going home? if you will be going home late again, you will be forced to quit the band.

This is depressing, I still want to continue singing for the band and my friend doesn't seem to understand my situation. What should I do now? The worst thing that I can't understand is that if she's not in a good mood why  does she have to include me, i mean she should have talked to me more politely. I don't want this to happen but   I think I should not tell jokes and stuff to her in the mean time. I don't know when she will suddenly get angry and scold me again. :'(