In addition, I post daily to the Three Rivers Village Facebook page (they do not yet have a website) so I spend time looking for relative articles to post. Aging in place, growing older AND happier, etc. Quite a few on making friends in our second adulthood. Because being social is part of being human!
There are so so many articles on socializing and happiness. Recently there was one of the "science" of being happier. Written by a Mayo Clinic doctor! His recently released Mayo Clinic Handbook for Happiness pulls together easy things to incorporate into a busy life to boost joy and fulfillment.
Lots of us are very happy with our small circle of close friends. We enjoy social time and value alone time. Lots of people belong to social groups (Red Hat Society, Yellow Roses, etc). (I have one friend who belongs to 4 or 5 of these!!!) We also are very active with our local adult community center for potlucks, educational talks, classes as well as trips. My little town here in Oregon has the Newcomers Club, a spin off from Welcome Wagon 50 years ago. They are now a social and philanthropic group with over 200 active members. There are over 20 groups within ... wine tasting, bridge, yoga, dinner groups, and more. I'm going to look into something like this in Maui. Or "meet ups" where like minded (and like ages, I hope) get together.
And ALL of these social groups ... are on Facebook!!