@Steve Bowles - great thread and thanks for having the bollocks to write something as personal as this. I've though long and hard about how to respond to this thread because I know that some might misinterpret what I've written and will discount it because they will think I'm being an peanut. That's no how it's meant.
There seems to be two responses to this thread: 1- no real close friends but I'm OK with that. 2- I've no real close friends and I'm
NOT OK with that. This is for the second lot and a precautionary tale for the first.
Gentlemen, get a grip. This is your life and only you are responsible for living it.
I'm in the middle of a divorce and like many men my social life (well anything outside of work) had eroded to simply being an extension of my (ex)wife's life (who didn't have to work (but she does now - hahahaha) and so could be the family social secretary). When that safety blanket was pulled out from under me it was a hell of a shock and there was no-one to go to the pub with outside of a few work-colleagues. In effect I had no life outside of work and one day I'm going to retire, and what then? [I have two very good friends, one in Denmark and the other 150 miles away so I rarely get to see them.]
We have a choice in life: accept what we're given, or try and change / improve what we are given.
If you are unhappy at being lonely then put the work into not being lonely. Join the Masons; find a
Men's Shed https://menssheds.org.uk/ or create your own; join a club you used to do when you were younger (so what if you can't play football like you did when you were 30, be the club treasurer (no-one wants to do that job)); volunteer at a nature reserve; help rebuild a train; help the homeless; but please, PLEASE, don't accept that because you're lonely now you have to remain lonely. It's a choice you make everyday. I'm sure that you're busy doing other stuff called 'life' but this is also your life and we make time for the things we think are important, so make this important.
I hope this helps someone.