I'm not a fan of kids either. But hey...guess what? Not being willing to put on your big boy pants and suck it up for an hour is the very definition of "being a selfish asshole".
The fact that the first thing you talk about is how those kids are "going to be the focus of the occasion" (your words), shows that what you lack isn't "enthusiasm about catching up with someone". What you lack is basic human empathy.
Someone please put razor blades in this fuckers twelve daily bigmacs already please.