I'm shy/have social anxiety, the anxiety bit is taking the shyness a bit further, going from finding it difficult to talk to new people to finding it almost impossible to talk/think of what to say and my heart will pound and I will make my exit as soon as possible. I don't recognise the shyness as being something that then attracts people to make the effort with me, quite the opposite. Similar to a previous poster I am the opposite of arrogant, I actually think I'm doing people a favour not talking to them!
Conversely I have no issue meeting people and chatting along when I am introduced at a party or sat in table at a wedding. It's still tricky getting started and sometimes you won't find any connection with a person. What I find crippling is social situations where I don't know anyone and there's no obligation to talk - the school gate is classic, as is any social invite where I don't know people and I'm only there to socialise, talking about myself when I think I'm dull and boring.
It's actually much worse being a mother, I just have the overwhelming sense that in this country we are so bloody judgemental - parenting choices, the way we talk, how we look (I look a lot younger than I really am so could be taken for a having been a teen parent in a school where the parents are older than average) and even for giving up my job. I have been judged by people, friends we are no longer friends with, and it's horrible. I'm sure there are genuinely nice people who aren't competing and judging others' parenting but it's just going to take a while to get to know who they are (I do feel much lighter and not so judged when I don't have the kids with me). This is all with the background of a bad home life and bullying throughout school, it's deeply ingrained mistrust of people and will take a long time to resolve, if ever. In fact I'd rather people mistook me for being aloof than nervous, stressed and in pain - that's a physical issue, walking hurts, pushing the pushchair and holding a hand is worse.