I think it's all too easy for people who've made a particular lifestyle choice to (often inadvertently, I'm sure) narrow their circle of acquaintance to others in similar circumstances. I'm 37, married nearly 16 years, w/3 kids; I have lots of friends who are also married w/kids, BUT I also have lots of single friends, unmarried w/partner (either sex) friends, couples without kids friends, friends whose kids have grown & gone, grandparent friends, college student friends, etc, etc....(y'all get my point, methinks!).

It's important to maintain relationships of all sorts with a wide variety of people; otherwise life would be so much less interesting & we'd miss out on learning a lot! A big part of being a "grown up" of any age is understanding what is right for you, and letting others make those choices for themselves! People who insist that all their friends MUST settle down & pair off in order to be happy do them a disservice; just as those who choose not to make babies have a right not to be continually told how they "should" do or they'll be sorry later, or are selfish, etc.

Vive les differences, sez I!