So me and my cousin....

Had a mister understanding but she got over it before I did. I’m not going to go into detail for what happened but I told her I didn’t feel like talking after she asked me a question. She replied WOW I’m blocking you off my story you always screenshot and it’s so annoying” I really didn’t give a fuck when she said it because I was in such a bad mood. I put on my Snapchat story “ Busy with my cousins❤️❤️❤️” Right after to let people know not to bother me. I texted her an hour later but I saw that the snap was pending. She blocked me completely because of what I put on my story. I texted her just with I message saying I wish you were patient with me I just wasn’t in the mood to talk but she left me on read. I texted her again saying why did you block me completely when you just said your story ? Later that night she added me back like nothing happened. She got over it without me even apologizing? Or talking it out. She over reacted and I’m the only one who said sorry. I just don’t see how it’s fair. I put a whole paragraph explaining why and she just said she doesn’t care anymore when I was really hurt. I know she didn’t read it because it was dumb long and she just said I needed to calm down and she denied that she blocked me. I wish she would own up to it. Can someone give me advice? Every time something like this happens she is so Petty. She goes on her story and says something so I can figure it out. So I want to do the same. We’re fine but I just want an apology.