Is AUTHOR wrong in the post ? POST : AITA for ending this friendship?

I've known this person since the first grade (I'm currently in my junior year of high school). Ever since we were little shes had little respect for all types of boundaries. This includes telling random people all of your deepest and most personal secrets, no respect for personal space, and an array of other social norms. In middle school she used to literally beat the shit out of me, and say she was just being 'playful' (Don't get me wrong she wasn't this big beefy 13 year old girl that could just destroy anyone in her path, but I was malnourished and really small during this period. I think I was around 90 pounds back then and she was like 150 or something so of course she was gonna be able to shove me around). It got so severe that several teachers confronted me about her after classes. You get the point, shes doesn't have boundaries. Since elementary school I've known that shes a bit toxic, but I have a hard time with confrontation and saying 'no' to people so despite my best judgement I've remained friends with her for the majority of my life. Over that period we got *really* close despite my opinions of her. 

Now here's the straw that broke the camels back: (Trigger warning  about mental health stuff, sexual abuse, and self harm) I've struggled with my mental health for as long as I can remember. Obviously I regret it now, but I used to confide in her about it. My dad is an alcoholic, and she was the only person I ever told. I was molested when I was 11 and she was literally the only person that knew about it. She was the first to see my self harm wounds (By the way, I've been off self harm for about two years now, we all good), and the only person I ever confided about that to. Despite knowing this stuff and how it affected me, she always poked fun about all of it (Usually not in front of people until a certain point), she make 'daddy issues' and emo jokes about me all the time. I tried to laugh it off, but since she was the only person I had ever told about any of it, it really made me feel like it was unimportant and something to be ashamed of. One of the worst things shes done was jokingly make sexual advances towards people, almost all of our other common friends have experiences of her creeping on them. I was always around her a lot because we've had the same honors classes throughout middle school, which guaranteed that we would have almost identical schedules. So I tended to experience the creeping on a regular bases, and since I had experiences with sexual abuse previously it made me seriously uncomfortable. 

So one night my phone just starts blowing up with people asking me if I was okay and shit. There were a couple of numbers I didn't even recognize. She had told some people about almost all of my trauma. From there it just spread like wildfire. So now my entire friend group and people that I dont even know, are experts about my life story, which I myself had told only one person about. Despite the fact that I had been doing well, not depressed, not cutting myself or anything for several years, I'm now known as some kind of psycho-bitch, self destroying, maniac. I never told my parents about any of it either and I was afraid to, so I just went to school like normal so they we're suspicious of me or think I'm depressed or anything (not that it did any good). So I get on the bus and once I showed to school the majority of my friends are swarmed around my locker wearing crisis mode expressions on their faces. They tell me that person heard it from what's-her-face, who heard it from my now ex-friend*.* Who I assumed painted me as currently suicidal. I blocked ex-friend on almost everything and I called my parents to pick me up a few periods into the day before I had to see her. I don't show up the next day.

Someone tells the guidance counselor that I'm apparently suicidal and the guidance counselor calls my parents. 

They want to put me in therapy now.

I haven't been to school in a while now, ex friend has caught onto the fact that our friendship is over due to my vague and indirect snapchats. My friends tell me she shows up to school crying the next day, say I was being unreasonable, and that it wasn't a big deal because she only told one person that I was friends with and who wouldn't judge me. They say she wants to talk to me, but honestly I don't know if I ever want to see her again. At the same time I don't like knowing that I made her cry, and I don't know if I could say no to her if she apologized to me. I feel kind of guilty because I think in her own way she was trying to help me or get people to support me, I guess. I just hate that she did it in that way. It's my own decision if I want to tell people, right? Like, I'm not sure why she thought telling people all my personal shit was just gonna go over smoothly. I just don't wanna make anyone feel bad. Was I being unreasonable by just ending the friendship rather than talking to her? AITA?