How to stop feeling overwhelmed while being a BPDs fav person?

Hi, last year I met on Tinder a girl with BPD. We both are about the same age (20). I used to have daily chat with her for 3 months until we met in real life. We first met on July, both of us spend a really good summer and by september, we started dating. This girl used to have anorexia and other ED, at 16 she partied a lot and took hard drugs several times.

I am a 20 year old Computer Science student, I am strong and healthy and maybe some people consider me "the perfect boy", even though I am far from perfect but that's me from the outside.

So this girl, when we started talking, she told me that she was Hungarian but born in Spain, my country. She also told me that she stopped texting other boys one month after knowing me on Tinder, she told me that she just had sex with one person, and never been in an official relationship. She also told me that she had a lot of friends and that she never met any random guy irl. Well so I recently discovered that none of that was true, she left Hungary when she was like 9 yo, one week before our meeting irl she was doing sexting with a guy she used to talk to on Tinder, I discovered she had sex with a random guy for first time, and few more lies.

What bothers me? I feel like this girl wants to sell her as the perfect girl for me, but Idk why, we have been dating for 6 months I have seen her in the worst conditions imaginable (she overdosed on benzos after an argument). She has abused of me psychologically plenty of times and physically one time. She has texted all of my friends and my sister some times when we had an argument and or I ignored her. She has yelled at me on public several times.

What really bothers me? I have completly lost my f*cking mind. It's 5 am, tomorrow I have a data structures and algorithms (subject I faild last semester) mid-term exam, and I am here, writing this. This girl drives me crazy, I HATE LIARS. I used to lie a lot but I stopped doing that so now I hate it. When someome lies to me I feel so dumb and so bad that I have to do other things to feel good (ignoring that person, talking to someone else/cheating, keep my mind busy with other subjects). Idk why this girl lied so much about her life, man I've seen her completly peed after the benzo overdose, why would she lie about some random shit?

Well so what happened, few days ago, I had curiosity about how many people she dated. Ik I should have not do this, but I felt like I needed to do it, I feel really sorry now, but I checked her phone without telling her. After that, I saw that she lied to me on all of that, not extreme lies, but things like, she had two sexual partners, she was not from Spain etc... Well so what happened, I asked her about her sexual past, I told her I knew the truth and she continued lying. I got really anxious about her lying to me after all, like why would you do that? And we started arguing. I talked her bad because I felt disappointed, not about the sexual partner but about all the lies. She felt so bad and she installed Tinder and Hinge (both dating apps), I saw it and I had an anxiety attack, it got so bad I puked, broke some cups and started yelling at her, I felt out of my mind because of she lying all the time.

My questions:

What the fuck would you personally recommend me to do, dump her, wait to see if she changes its behaviour, continue stalking her, stop caring? I don't really know, I don't want her to cheat on me as some BPD people do and I don't want her to act even crazier, I want her to be okay.

Do you think she will get tired of me? Ik BPD people love like no one, but Idk if they also hate like no one. I don't want her to l3ave me.

How can I have a BPD person to tell me the truth, not l3ave me and love me even if I am busy?

Finally, how can I stop overwhelming my mind with this girl, I feel like she is the core of my world and if I do something wrong, she might cheat on me or maybe get tired of me or do something in revenge for not having enough time for her.

Thank you so much to y'all and sorry if I am not expressing myself right (it's 5am, two nights ago I did not sleep at all and English is not my first language).