AIO to my friend ending our friendship?

So, for a little background, I've [29M] known this friend, Joe, [35M] for 5 years. We used to work at the same software company. We have mutual friends who are in our Dungeons & Dragons group (that sadly got disbanded because everyone got too busy in 2024).

I don't really have many friends and Joe here is one of my closest friends. We've shared Ubers together, hung out for dozens of hours in 2024 alone. We bonded over our dating app struggles lol. Joe used to live with his mom and sister until he recently moved out to buy his own condominium. I still live with my friends, whom Joe is also close with.

In the texts, he mentions Kathryn, who was a girl we both met through another friend, Tim, on St. Patrick's Day. Joe got her number, but he never ended up doing anything with it, aside from a few texts. He did kiss her at a wedding we all went to. But, he never dated her, nor went on a date with her. He's been on other dates since the wedding.

But, I barely remember her, and haven't brought her up to Joe. I don't really think I'm a petty person; my other close friends whom Ive talked to about this don't think I am.

I'm very hurt by his messages, and I don't really understand what he's insinuating. Am I overreacting to all of this?