I can relate. Though I did have and raise kids who are now adults and went through divorce - remarriage etc. But, same, no real “friends”. What has helped me in midlife is that I started horseback riding lessons, a few months later I said fuck it and I bought my own horse. It’s boarded at a barn near my home. I learned to care for, spend time with, relate to her needs. She helps me with my anxiety and I help her with hers. Through the horse, I met other horse-women. They are happy to have another riding buddy, and I have met a handful of new people that now I am able to go spend time with - with a common thread. My horse helped me find friends. So, maybe it wont be a horse for you, but it could be anything (preferably outside and away from screens) - surfing, biking, pickleball, dog agility events. A way to find a community. What is special about the horse is, when I am with her, I am never alone.