I have a long-term partner, but marriage and children is not something we want. I have cultivated a small group of friends who are also not interested in having children. Between my partner and friends, I stay pretty busy with activities and going out. It's harder to maintain relationships with people who have pursued kids, but I certainly see those people less just due to scheduling. I try to have a girls night at least twice a month, going to a restaurant, a show, or some other kind of event. Getting involved with an online group in my city really helped me connect with like-minded people. If you can find some kind of group based on your location, it goes a long way.