@PhilCornwall1
I'd be very very wary if a new partner had no friends. To be blunt I'd think there was something seriously wrong with them.
What is it that would be seriously wrong with them?
Well, it will depend on the person. But, based on the people I know/know of who have no friends, and posts on here, it could be one or more of the following --
(a) as with the friend whose only friend I am described up the thread, that the friendless person is simply too lazy and/or passive to make or maintain friendships. Friendships for this type of person are like taking up running when you don't really want to -- you start Couch to 5k a few times but it peters out. This person is often very low-energy, and just wants to come home from work and watch TV, and even a WhatsApp message is too much to ask.
(b) the person is the kind of person who limits their life to one person, their longterm partner or spouse, and 'borrows' their friends. hobbies etc -- so that when that relationship ends, so do the friendships and hobbies and the person goes into stasis until their social life is revived by a new relationship with associated friends and hobbies.
(c) the person is in a controlling, overly-exclusive or obsessive relationship my sister met her boyfriend her first day of university and the relationship became overly-close and exclusive immediately, which meant she never made any other friends throughout two degrees and the two of them subsequently living in different countries as English teachers. When he broke up with her after fourteen years, she had literally no one in her life to phone he'd just walked out in a remote part of Asia -- having even distanced herself from even family because he fulfilled all her needs. Until he didn't.
Or the person's partner actively prevents them having friends.
(d) the person is a total misanthrope, and has a profound dislike and mistrust of literally the rest of the human race, because everyone is awful apart from them, their dog and possibly their husband/wife/mum.
(e) the person struggles with basic social skills to the extent that they can't hold a conversation with another person
(f) the person is an unpleasant form of drama queen who sees spite, ill-intent and malice in all social interactions and huffs off, declaring that all friendships involve 'two-faced' people.
(g) the person is a people-pleaser with poor boundaries, who thinks friendship involves service and allowing yourself to be exploited by people you don't even ask yourself if you like. When there's no reciprocal 'service', the person is hurt and says they're surrounded by 'users'.
(h) the person is not neurotypical and struggles with relationships
(i) the person, like my mother, thinks friendships are for the young and unmarried, and that you retire them on marriage, apart from Christmas cards.
(j) the person suffers from phobias/MH issues which mean they lead a very limited life.
(k) the person is desperate for friendships but is visibly trying to fill a lack in their own lives and comes across as desperate and too full-on for other people to initiate a friendship with
(l) the person is unlucky in where they currently live, and is, through no fault of their own, a poor fit with the kind of person available locally
I could go on.