I feel quite reassured reading these responses - certainly a lot more 'normal', anyway.
I always had lots of friends at school and in my early twenties, a few fell away when I had children, but I made new friends with several women from various baby groups.
We moved away from my home town when I was around 30, and I didn't see much of the old friends, or baby group friends I had after that - although I was good about keeping in touch via Facebook. I came off Facebook about a year ago and it's been quite telling. These days, I would say I only have 2 friends. One friend emigrated to New Zealand 10 years ago and has a family of her own there now, so we see eachother only once every couple of years, but Skype monthly and text regulalry. My other friend lives about an around away and I see her about 6 times a year.
However, I am really close to my DM, she lives alone, about 5 minutes from me and I see her most days (pre-COVID; I'm CEV and she works with the public) and I'd call my DH my 'best' friend. I'm really lucky to have married someone I can share anything with and who has a sense of humour that meshes well with my own - I don't think anyone else finds him as funny as I do!
I do feel a little jealous when I hear people talking about meeting up with groups of girlfriends and enjoying parties and Christmas meals out with their colleagues, but I feel like I've done all that in my younger days and I'm happy with my life as it is now. I do have space in my life for friends, but I find it really hard to move a relationship from colleagues or chatting at the school gates, to a friendship.