Best friend - probably the most recent of the lot but still been friends 18 years or so. We see each other once a week at least, and either chat on the phone or text through the week too. Used to go away together every year for 2 weeks, different now as I’m married and she has DP but we do go for weekends/ long weekends when we can.
I’m also friends with her sister, know her parents well, we go to each other’s family events etc.
Other best friend I met at uni. Lived together at uni, travelled together etc. We both moved about a bit and have ended up at opposite ends of the country but meet up a couple of times a year at least and keep in touch via WhatsApp in between. We arrange a day out somewhere in the middle of the two of us every 3-4 months and now her little girl is getting older we can do the odd overnight stay too.
2 friends I was at school with. We were out every weekend in our late teens/early twenties, girl’s holidays in Magaluf, all that kind of thing. They had children quite young and I didn’t, and over time we have got to the point where we see less of each other, but still get together for birthdays/ special occasions and then a couple of meals out or nights round one of our houses with wine a year. The kind of friends though where we could go ages and ages without speaking/ seeing each other then get together and absolutely nothing has changed and we still make each other cry with laughter.
Another friend I met in my first job post uni. We were extremely close for a long time, lived and worked together and were out all the time too. After I moved back up north and she moved further south we’d still visit/ stay with each other fairly often, then she got married and had DC and so there were less nights out/ weekends away but we still get together about twice a year.
I consider both my sisters to be close friends too and they are both older than me with adult children - my eldest nephew is 4 years younger than me for example - and I am friends with them and their partners in the sense of socialising together, helping each other out etc.
I’ve had lots of ‘situational’ friends that I’ve met when working or living in a particular place for example and for on really well with, still keep in touch via Facebook or the odd message, will see occasionally and always happy to see them but neither side make any particular effort if you know what I mean?