AITAH for wanting my breadwinner dad to choose another school for me to go to because my ex-friend is there?

Yes, ik that I sound like a spoiled brat in the title but just hear me out,

I'm graduating junior high school and want a new fresh start because my reputation in my current school is not that great. And there's no senior highschool in my current school so I thought that this could be a great opportunity to rebuild myself with new people. But I learned as I am typing this that my ex bsf (let's call her "Mia") is going to the school that I plan on transferring to.

For context, Mia was the kind of friend that was really nice at first, but overtime became one of those people who thinks that being "mean/fake" is iconic or baddie behavior, yes ik it's cringe but it's the truth. She would scream at my other classmates if they didn't get a simple thing right, manipulating other's feelings-wether that be romantic or platonic, she even screamed at me when I was just saying that the crowd was too packed-telling me to stop complaining and the saddest thing is the teacher took her side and said "don't complain if you didn't even contribute anything". She would be friends with people who backstabbed me because "they never did anything to her".

The final straw was when I was at a school trip with her, I just wanted to tag along with someone because some of my classmates would always leave me out at the time. And me being the pathetic person I am, I followed Mia and her "new friend" around like a freaking dog. And then Mia's new friend insulted me and she didn't even say a word. That's when I finally realized that she was never going to change or be the old her again. So I stopped approaching her all together.

Then when school was almost over, there was a gc that got leaked that was allegedly talking bad about her-so she moved schools when the commen school year was over.

Which brings us back to today, because apparently she's in my life again. I don't have anyone to talk to or seek advice about this because whenever I try to explain myself of anyone they'd always give the tired, generic answer about "be strong" "just don't mind her", including my dad, not to mention the school I'm transferring to has a very huge discount because of a program (I want to keep it blunt because I don't want to reveal anything private in my life) and it would really be a bug help because my single dad is already struggling to support both of us financially. I tried talking to him about things like this before but he'd either give another generic answer, yell at me about not knowing what it feels like to be a parent, or just cry to guilt trip me.

Ik not wanting to be in 10ft of a person sounds dramatic to some of you but the thing is, it IS that deep. I have panic attacks whenever she's mentioned and she really destroyed myself worth. I just want to live in peace without her ruining it again. (I'm sorry if my writing is messy, I just can't stand keeping this to myself anymore)

So what should I do? And AITAH?