What beansonbread said.
Anxiety and especially social anxiety runs in my family and I was emotionally abused as a child.
The result is that although I can fake being ok in some circumstances, I have crippling social anxiety. I can manage casual two-minute conversations at work because I have something obvious in common with those people but dealing with strangers in other situations is terrifying: buying things in shops, filling up the car —because I can meet someone 100 times and still not be able to make small talk with them and so come across as petrified and/or horribly unfriendly.
One or two things get easier with repetition, others get worse, because it's expected that you get more comfortable with people the more often you see them. But when you still can't think of a single thing to say to them after literally years it looks weird, so it gets worse.
Of course anything more than casual acquaintance is out of the question. Even if I can fake "normal" for a while I'm terrified people will find out the truth, and start-up friendships run out of steam.
My life is lived in white-knuckle fear most of the time and to suggest it's an attention-seeking measure would be laughable if it weren't so wrong-headed and ignorant and plain mean.
I don't know anyone to "coddle" me, even most of my family just think I'm aloof or snobbish.
I was an academic high-achiever but because I had absolutely no self-confidence and couldn't network or project confidence in interviews or "sell myself" I didn't aim as high as I could have and now have money worries. Of course I was a sitting duck for abusive men and have been alone for 16 years since my last relationship broke up. I don't know any straight single men and there's no way I could survive OLD even if I were an appealing age and in a suitable location.
There are a few things I have to do that I force myself to do because there would be dire consequences if I didn't, or it would mean letting someone else down (mostly my DCs) or confessing to them that I''m too frightened to do it.
But the things I need to do/would like to do just for me — going to a party (if I ever get invited to one) — or going to the dentist or for a Pap smear or going for a haircut or a manicure —I just don't and can't do. It's going to have awful health consequences one day. It's horrible. My DCs are the sole reason I'm still here.
Other people may have deep anxiety about particular things, eg public speaking or flying, but when it's about something as basic to human life as getting along with other people it makes life a living hell.
Nobody would choose to live like this.