Why does my mom seem to struggle with accepting the idea of me being independent or self-confident?

Nowadays she makes so much drama every time I go somewhere by my own. I’m 20 and she keeps nagging me to get a boyfriend (I had one but we broke up about a year ago, the BU was kinda traumatic for me and now I’ve just got better) because ‘I’m getting older, everyone at my age have someone’ and similar bullshit

She tells me it’s so bad I can go to restaurant or cafe by my own because I should go there only with my friends or boyfriend. She keeps telling me I’m ALWAYS alone what’s bullshit because I meet my friends at least once a week when it’s academic year and several times a week when it’s holidays

I think it’s very normal and healthy to have your own space and days when you don’t meet anyone, as you can have your own business as an adult person. I see she has the problem with blaming others for her bad mood (she used to insist on me to make her happy, fortunately she stopped or she says it’s dad’s fault she doesn’t leave home because he doesn’t want to go with her). I think it might be a generation gap but I’m still sad and a little triggered with her attitude. It’s like she was just uncomfortable with an idea of me being confident or independent – if I’m not dependent on her, then I should depend on friends or a man. She says I became egoistic and won’t be able to date anyone as I’m selfish but I really don’t see any problems with spending time with other people and any reasonable reason why I would find it hard to date anyone

Why is my mom like that and what do I do?

TL;DR: my mom seems to want me to be dependent on other people and I think it’s too much