But that really doesn’t help the OP, if you encourage her to think the issue lies entirely with other people, and she can’t do anything about their behaviour, only her own.
Obviously, no one wants to be around someone who only monologues about themselves, but only the most limited of people are going to want to have a conversation where the other person only ever asks about them, encourages them to talk about themselves etc.
My mother has spent a lifetime doing this, and now she’s an isolated 78 year old because she always puts the focus squarely on the other person, because she doesn’t think she’s important enough to get airtime, so everyone tends to take her at her own estimation, that she’s unimportant and uninteresting, so no one knows her at all.
And of course this behaviour tends to attract monologuers. Listening to her on the phone is depressing — on a 40-minute phonecall, you will only hear her say ‘How are you?’, ‘How is X?’ ‘Did he?’, ‘Yes, I remember you saying’, ‘Mnmm’, ‘Oh, yes’ and ‘Oh, really?’
It would be easy to blame every single person in my mother”a life, but the fact is, her behaviour is the common denominator in all these relationships.
And yes, she was never socialised to have friends and neither was my father (both from very dysfunctional backgrounds), and neither was I. I had to learn how to talk to people by observing. It can be done.
The first step is to believe you are interesting and worthwhile.