I also have no friends. 48, never married (just splitting up from dp so will be moving house), no kids. I never went to uni so no friends there. Did an OU degree, made two friends, one was an actually convicted paedophile, the other is OK but a bit weird (both men, both married. None of the women spoke to me but all seemed to know each other somehow).
Locally loads of neighbours and acquaintances but none I'd call friends. None ever pop round to see me. We have hosted several parties, many of them have come to but rarely get in invite back. Most are just very busy with kids and me having no kids means I don't fit.
Dp has lots of friends, he made a point of making a couple of new friends when he got divorced, both blokes who were going through divorces too - one a colleague, one a neighbour. But I don't feel these, or their partners, are my friends. He has in the last year or so become best mates with a new neighbour. We've done a few things as a foursome but the woman always says oh, we should meet up when the boys are away, never contacts me, always cancels anything we do arrange. I have opposing political views to them so I'm not very bothered about hanging out with them.
But when I move I won't even have these acquaintances any more and will have to start again.
I work in HR so not much chance to make friends at work, plus I do short term contracts so never really get to know anyone very well.
Like someone else said, I am hopeless at small talk, it just leaves me cold. I suspect i also come over as very independent and not in need of any friends. I'm also not a big drinker and lots of the fb posts I see of people having a great time with friends seem to involve being very drunk and covered in make up. I'm just not like that.