Best Friend Problems 😒

So I've been best friends with this girl for almost 9 years. I went to her house the other weekend and my BF came by to hang out with us like usual. He couldnt get a ride till late.(she got annoyed, even tho he brought her some stuff she had wanted/needed) The next day he was trying to get a ride back over to chill so she could see her bf too. We tried to figure it out all day and she seemed chil about it. Then she invited some girl over I really dont like and she ended up sleeping over. They didnt include me when dinner and stuff was being made. A couple days after I had left she was all up in my buisness texting me trying to confront me saying that I was using her to see my boyfriend. He normally hangs out with us and brings some stuff for her. Then she can have time with her boyfriend too! Then she was trying to say that I didn't try to do anything with her and that I was only focused on my boyfriend. She was also getting angry at me because I told her boyfriend to shut the fuck up. I apologized but I told her I didnt appreciate the way that he was talking to her because he was being an asshole. (Was that wrong of me to be protective over her) she was on my case about a whole bunch of other little mistakes Ive made and apologized for in the past acting like shes the perfect little princess. I make mistakes like everyone else and I refuse to apologize if I dont mean it. Things seemed to be good this night. But then a couple days later i posted a couple snapchats to my story about a general idea of things that happened with her but nothing had her name in it like I was directing it to her. She got pissy this night and kept texting and trying to call me. I didnt want to answer but her boyfriend was like you should just answer. So I did and she was calling me a coward for not answering. She was trying to walk all over me. Shes made plenty of the same mistakes I have and didnt apologize. She used me once so she could go out and have sex with her boyfriend. Who does that!?!? Shes made me feel useless because she'd make so many plans with other people when I was going to hang out with her and didnt tell me until I showed up. I never straight up confronted her about it because I was like well shes my best friend I dont think she means to do that to me. Was I wrong in any part of this? I apologized so many times.. It's like shes trying to make me feel guilty. What should I do? I told her that it was up to her if she wanted to start over with being friends, because I wasn't going to argue with her about it. She hasn't said anything since. She's stressed me out with all this so much I layed in bed crying for two hours with my body trembling uncontrollably. She just doesn't listen. Has anyone experienced something like this? What do I do?