Do avoidants breakup over false narratives they create in their head?

One day after spending the weekend with my girlfriend I said goodbye to her at a train station. We were a lesbian couple and my first same sex relationship so I struggled a bit with when and when not to show PDA. A football match had just ended and a load of men flooded the train station which filled me with fear as to what they’d do if they saw us kissing. I stalled for time going “umm sorry I don’t know what to do” pacing around, and we had the most uncomfortable kiss goodbye where I was shaking and stuttering and ran off.

Afterwards I felt so ashamed and I had a bad feeling as it was the first time she hadn’t text me when she got home so I knew something was wrong. I felt panicked and I should have just text to explain what happened, surely she’d understand. But like an idiot I pushed it out of my mind and told myself she probably knew why I was acting that way if she read the room. I told myself if it wasn’t a big deal and if it was a problem she’d tell me. I forgot all about it after that day.

The next week she broke up with me saying our romance was “forced” and “everything just added up in my head” and had this whole narrative she created about different events, which could’ve been explained had she just asked me about them. She had all these reasons why we were incompatible but had never voiced a single thing to me the entire year we were together. We’d never had a single argument ever, I feel like she was incredibly conflict avoidant. I asked how long she’d been having doubts and she said “only since last week”. I stupidly didn’t ask “what happened last week?” as we’d had a lovely weekend in my eyes, and I’d just met her friends, I couldn’t think what made her feel that way. It wasn’t until 2 months later it suddenly dawned on me and the memories of that kiss came flooding back and I had a mental breakdown at the realisation. It’s killing me every day that I didn’t explain to her what happened and never will. I know it’s also on her and she could’ve asked what it was about, but I still can’t forgive myself.