I'm in my early thirties and adamantly childfree. I'm lucky enough to be in a long-term relationship with someone who brought up her desire to be childfree on more or less our first date. But I am not having too much luck with my friends from childhood and university - they all seem to be wanting kids, and learning of their pregnancies leaves me with a feeling of sadness. I don't hate kids and think no one should have them, and I am happy for them if they truly wanted this, but I also know what them having kids will mean - we are essentially putting our friendship on hiatus, and I still don't know whether waiting 10 years for the kids to be a bit more independent and not requiring as much attention will mean I suddenly have friends again, but somehow I very much doubt it. And I also don't want 10 years without other friends than my girlfriend. She is in very much the same situation, and while we are good at making the best out of not having kids and stressing about having them, we both would want to be able to hang out with good friends once in a while, both common between us, but also some that are exclusive to each of us.
My assumption is that this is quite common - so I am hoping someone would like to share some success stories in turning this situation around. :)
Why do you assume that this is good, desirable, or a condition to continue a friendship?
I don't like kids, I have a few friends with kids, some of them really like me, if it were up to me I'd prefer if the kids they didn't even know I exist.
That said, I value my friendships with their parents. Having a good relationship ship with their kids means my friends get to stay in my life. If I don't have a decent relationship their kids, that limits how much I can see with my friends, and if I'm particularly rude, antagonistic, etc. toward them they may choose to cut me out of their lives entirely. It's a matter of whether you like your friends more than you dislike kids.
If your dislike of kids outweighs how much you value your friendship, I think that can be a valid position to have, but it should probably also raise some questions about whether you value your relationship with your friends enough for it to be worth continuing, and/or whether you have some unresolved issues with kids that you may need to address.
If I never had to see my friends' kids again, that wouldn't bother me one bit. If I didn't get to see my friends for years, that would bother me, and for now at least, my friends and their kids are going to be a package deal, so in my case it's an easy cost/benefit analysis. I value my friends more than I dislike their kids, so I'll tolerate their little crotch-goblins.
I specifically object to the "becoming an uncle" part. This includes special attention, gifts, considerations well beyond what I'm willing to give even to my own non-immediate family. Visiting my friends and acknowledging, even interacting with the kids superficially, that's more than OK. But they are not my family and they'll never be.
I'm wondering what kind of family you have where this is considered a norm.
I'm quoting other people's answers that appear to express those actions as the norm.