It is impossible to understand this story without context. TL;DR at the bottom

We were both in high school, we met each other through the Science Olympiad tryouts. She was passionate about microbiology and I was passionate about biochemistry, so we covered each other's blind spots during our competitions. Over our first year of events, we grew fond of each other, leading to a romantic relationship. We both wanted to study at the same college, and both wanted to work in a lab.

After a decent amount of time together, I started developing symptoms of what later would be diagnosed as Hepatitis C. I told her immediately, and at the time I was not aware of any affordable treatment. She didn't mind and behaved normally, which I appreciated. However, after a couple of weeks, she began pointing out all visible symptoms during our conversations, most commonly jaundice and weight loss. It was irritating, because in the matter of half a month, she went from regular conversations to a continuous description of my condition.

I told her to avoid talking about it. I was looking into human trials for Hep C treatments in other countries, but she wouldn't stop. So one evening I sent her a text saying "I'm not quite comfortable talking to you. I'd like to take a break for a while until everything quiets down. I'm sorry." She replied with a "That's ok, take your time." It seemed like she understood her mistake and wanted to give me time to recover.

After 1-2 weeks of just greeting each other in the hallways, I was ready to get back into normal routine with her. I had found a relatively safe treatment that I would be taking over the summer, and was planning to tell her. Surely then she would stop mentioning my condition.

But now she began avoiding me in public, ignoring me if I tried to talk to her, blocked my email, phone number, social media etc., leaving one edited message: "Hi thanks I'm done with you."

From that day on, not a single word was exchanged. I tried asking for forgiveness, taking all the blame for ruining our relationship, asking her friends why she is acting that way... But nothing came of it. She just kept ghosting me.

It has been over 2 years, and I'm free of HCV and its symptoms now. I'm a freshman in college and she's still a senior in high school. I visited my high school a few days ago to chit-chat with my old professors, and she still avoided me in the hallways. To me, it seems like she hasn't matured one bit.  

So, AITA for handling the situation like I did? Is she TA and should I just move on without closure?

TLDR; I get diagnosed with Hep C in high school. SO finds out, won't stop mentioning it in conversations. We both decide to take a break for my own sanity. When I find affordable treatment for Hep C, SO ghosts me. 2 years later, she still hides when she sees me in public. AITA?