Traumatic Situation-ship Ending

I'm 15 years old, and I just ended a kind of sort of relationship that lasted a month and a couple of weeks. We broke up because she wanted to heal. In the beginning, our relationship was hectic as we weren't really friends; we just jumped into it. It was long-distance, and we argued almost every other day. It became too much for both of us, but I still feel mostly attached. Being introverted, she was a significant part of my life, and not talking anymore has left a gap.

We stopped talking mainly because I overthink a lot, and there were hypocritical things she did that I haven't gotten over. It bothers me and sabotages any hope of us getting back together, because we were still friends at the time. She got annoyed when I expressed how I felt during our time together. I didn't mean to be rude or criticize her out of the blue. When we were talking, I never opened up because she judged me every time. She was self-centered, closed off, and made me feel less of myself, often being angry when I'm more of a sit-down person. It hurt a lot, and I don't know how to get over it. Even though she wasn't good for me, she was a big part of my day, and I lost myself trying to make her love me correctly.

I acknowledge my faults in starting some arguments and probably upsetting her, and I apologize for that. However, I still don't feel like it was right. I didn't mean to push her away; I just seized the slightest attention and ran with it. Overall, I want to know how to get over someone who was a filler in my life.