If you don't want me for a relationship, why still talk to me?

There's this girl I've been "dating" (We went on one date with talks of future date plans) for a couple of months now and it was going well until all of a sudden there was a seemingly, immediate drop in communication, interest, and discussions of hanging out on her part. For example, she stopped interacting with me through instagram (Such as liking my post and muting me from seeing her story at one point). She would take longer to respond. Things of that nature. Then she started hanging out with a lot of other guys on a consistent basis at her house in her pool or jacuuzi. Posting these guys on her social media and flirting with them. I never got any of that "treatment" before hand and these guys just came out of nowhere.

Now I'm not stupid. I obviously know that means she no longer sees me in a romantic way and no longer wants to continue "dating" me. So I blocked her. I did unblock her and apologize and I explained it's because I liked her a lot and I didn't want to get myself hurt. There was talks about one specific guy we'll call "Austin" who she talks about on a regular to daily basis and even Austin post about how she's his girlfriend on his social media. Again, I'm not stupid. But she's lying to me saying "We're just friends. I don't see him that way" "He's just a troll he doesn't actually mean it".

I no longer ask her to go on dates. I no longer ask to see her or hang out with her. I've been limiting my interactions with her. Why does she still insist on communicating with me when she's clearly not interested in me? Especially by bringing up when she's hanging out with Austin and things of that nature? Is it that she just wants to make me jealous? Is she just looking for attention? I don't get it and I'm just about ready to remove her again and not explain this time.

If you don't want me for a relationship, why still talk to me?
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