WIBTAH if I broke up with my friend because she’s a shitty to me?

hey I’m f17 and I’ve been having an issue with my best friend, f16 of 4-5 years. ever since we’ve entered our junior year, she’s been very nasty to me. we share a few classes together and she kind of talks to me like she’s superior. in our college class, she’ll make fun of me and our other friend (also f17) for having fun by saying “open the schools” basically saying that we’re being stupid. itll just be us having fun and she’s just call us stupid. in our video production class, she deliberately talked over me when I was discussing our project. I called her out on it and she claims she didn’t hear me when i sat right next to her and the people I was talking to heard me and were listening to me. this was all back in Septembe-November, when the first problems came up. I decided to talk to her about it and she made it all about herself??? I told her that I didn’t like how she treated me like a child and she was like “but but but when you say okay instead of ignoring me it makes me upset“ regardless of how stupid it was, I still changed it because i wanted our friendship to grow. she however didnt take anything I said into account and still continued to speak over me and just general treat me shitty. Around this time, according to my friend (mentioned earlier about the college class thing) she had been talking about me for a indiscriminate amount of time. you know what it was about? she was complaining that I was ”bad“ at math and that I had too many relationships (mind you, I had just broken up with my ex like two months prior and was just kinda crushing around. I didn’t date any of the people she was complaining about) fast forward to January of this year and I am going through it, I felt like I was being a Debby downer and I wanted to tell my supposed best friend how I’d been feeling and that if it seemed like I was distancing myself, It was because I was just feeling things. I tell her this (KEEP IN MIND: I just wanted to confide in her and I didn’t want to ask her for help or anything, just wanting to confide in my friend) and she basically said that it “wasn’t her problem“ and that she didn’t know what to do. I was upset but I felt like it was wrong of me to vent so I forgot about it, but it strained our relationship. That was a month ago. since that convo she’s been extremely rude. she’ll make me look stupid or just but into conversations that she just decided to bring her unwanted two sense into. today in video production, her and our entire group were just treating me like I was stupid and deliberately doing things and then asking me why I won’t fix it or just trying to make It seem like I’m stupid. on top of that, the night prior she was chastising me about having a crush on a sophomore (who we share the same birth year and have liked each other since last year when we were both freshman/sophomore. I tried telling her that it hurt my feelings why’d she say that she doubled down and continued to call me gross) I told one of our group member that they were hurting my feelings and they were able to apologize. after school I texted her and told her that hey I didn’t like how you acted to me today and she flipped out on me, calling me inconsiderate and saying that I complain about stupid things and that I’m also in the wrong about how I’ve been to her. I hate her. she’s been so evil and horrible to me that my words can’t even come out coherent. she is the worst person I’ve ever met. I wish we never met. being friends with her has ruined my mental health. it feels like I’m a second class citizen to her . I wish she would go away, I hate her I hate her. sorry if this didn’t make sense I’m upset right now and need to get this off my chest. so, Reddit, would I be the asshole if I stopped being friends with her?

p.s I can drop ss of things she says for more clarification if requested.