I just read your story here, and I hate to bring it up weeks after you've posted it, but let me you: this happens a lot more than most people think. I've been here nearly 4 years now and I've heard countless stories from friends in similar scenarios. It sucks and it's fucked up, but hey, plenty more people to meet and so on.
This actually reminds me of an episode I've had with this woman. We met, she was new, had some guy already, then he joins and comes up to us. After a short while, they would either leave to their private room or make up some excuse. I was like, "Okay, we'll talk some other time. Have fun". This happened a couple more times or so and I told her to PM me whenever she had some free time, thinking that maybe she was doing it on purpose (to this day I could never confirm that). But, anyway, no big deal. They wanted to be together, so I understand. No excuses needed. After a few days, she PMed me saying she was free and that we could hang out or whatever. I was with a friend already, so, naturally, I told her I was busy at the moment. She seemed all right with it and said we could meet up some other day. "Cool, we'll do that!", I replied. Days later, she PMed me and yep, you can already guess, I was with a friend. This woman went nuts and started bombarding me with PMs (all Caps, by the way), saying I was doing this out of revenge and to make her jealous. I told her that wasn't the case, and it just so happened I was with someone (which was true) whenever she decided to have some free time for me and that I couldn't guess when that would be. The end result: she blocked me because she was pissed at me for not giving her some of my time when her partner wasn't around for her. I just thought she had a lot of nerve for being mad at me when I didn't say a word when she's done the very same thing in order to be with this guy. To make things even worse, I was later told that I wasn't the only person she's done this to.
2020 was definitely the highlight of my journey in 3DX perhaps due to the lockdown, but in that time period I've met quite a lot of... interesting characters, to say the least. I could tell you many, many stories, but that would take all day, and I'm quite certain that I would only be scraping the surface.