You’ve hit the nail on the head. I’m a lifelong single person. Over the course of adult life, since getting a graduate degree, I’ve made maybe three deep friendships, one of which petered out when she moved back from DC to Seattle. The other two: one I worked with in the late 1990s in a tiny design studio and we've remained friends all these years. But even though we live in the same Metro area, we get together rarely, even before covid. She has had a series of serious relationships, she is very involved in dance classes in her spare time, and she doesn't have car. The other friend I made playing basketball with, also in the late 1990s, and we've remained very close friends. Alas, she was in Georgia with her husband for 5 years, and now moved back but lives almost an hour’s drive away, and she has grandkids nearby, plus she has other activities, a very full calendar. I am pretty friendly and make casual friendships easily, but I have concluded it’s unrealistic to expect forming a deep abiding friendship, let alone several, in your 60s and 70s. Finding people whose casual company you enjoy to share a meal or a movie is about the best you can hope for.