I think in the moment, it would be hard to know what to do. There’s a lot of pressure from being in a place where you know a lot of people and it’s a new situation that you weren’t aware of prior and none of there people you knew, knew about it either. I think maybe you wanted the others to know you were okay with it more than you wanted the ex to know. It could have been both, I’m not sure.

Definitely, like others have said, he wanted you know about it, but likely didn’t know how or didn’t want to tell you directly. Given this event, I don’t think he cares about you as much as you might think.