I'm very cold and distant in public. Not because I'm trying to be rude but because of social anxiety

I have traumas and issues that prevent me from easily smiling at people. Plus I have a hard time standing up for myself so engaging with a stranger even in polite conversation is high risk for me.

It's sad because I'm not contributing positively to the lack of public trust in society today.

Therefore I rarely go out and when I do go out I don't linger. ,