I still think about my ex talking stage from 3 years ago

F20 for context, this talking stage was the closest I’ve ever been to being in a relationship, since then I haven’t been in another talking stage. Just to add, I’m also bisexual still learning things abt myself. And apologies for how long this is it’s just a lot. I met this girl on a dating/friends app in November 2022 and we hit it off pretty well. We kept texting and in just a week we were already pretty smitten with each other. I made it clear that I wasn’t looking for a relationship but I was open to seeing where it could go and she felt the same. A month and a half later we hang out for the first time and were super touchy and affectionate with each other almost as if we were in a relationship. Things changed after that day bc I realized there were just some things I didn’t find as attractive about her and i didn’t know this at the time but it was a deal breaker. Another thing was that I started to feel overwhelmed with how fast things were going. About a week later I ended things with her. But that wasn’t the end. We were on and off talking AND friends for the next 6 months bc I kept going back bc of my feelings for her even though they’d confuse me bc we tried to be friends and at one point she rlly did just feel like a friend. One of the times we were “friends” she started treating me like shit and it rlly hurt my feelings. I saw this side of her that I had never seen before and it hurt. Even tho it hurt, I still stayed. I think we stopped texting July 2023 but then I hit her up a month later just to find out she was talking to someone new so I stepped back bc it tore me apart plus that was the right thing to do. I then text her a couple weeks later just to ask how she’s doing and wanted to say some things but just ended up blocking her and deleting the chat bc I knew it was wrong. I guess some time in between those 2 months I unblocked her and she texted me but idk if I ever answered but I probably did. All ik is I hit her up again in December 2023 saying that I missed her and how we used to be and we talked the entire day but she brought up her gf and that’s when I knew I needed to end it for good. I blocked her and deleted the chat once again. I spent the 7 months without texting her or her texting me and was finally getting over her until her now ex gf told me a bunch of terrible things she did while me and her were getting to know each other so obviously that made me rlly angry so I sent her a msg going off on her. I sent this msg August 2024. Knowing that she was a piece of shit helped me get over her. Fast forward to September 2025 she randomly responds with a paragraph saying that her ex lied and I wasn’t going to respond but I ended up folding bc she double texted. I was also on the app that we met on and her profile literally popped up so that didn’t help either. So I threw away all my self respect and kept texting her every day for 2 months and hung out and hooked up w her. She eventually stopped making an effort to actually see me and started being mean like how she use to be when we were “friends,” plus it seemed like she might’ve start liking someone so I finally got tired of it all and blocked her everywhere. Here I am now back in square 1, trying to get over her again, but this time I have no plans on going back bc I’ve learned a lot from everything I put myself through lol. Even tho she’s a piece of shit, I still miss her and I fucking hate that. Also forgot to mention that in those 7 months we didn’t speak, I did hookup with someone for less than a month which helped forgetting her for a little while but once that ended I’d still think abt her here n there. I’m 100% aware that this is probably just attachment but idk how to move on and stop thinking abt her here n there. Why do I still feel this way? What can I do to officially and fully get over her? Also, I’m not open to getting to know anyone new rn or be in a relationship at all.