If you're confident you can be yourself around people, because you feel good about who you are. SA is born from low self-esteem. Confidence is the antidote to self-esteem.
I feel more confident around some people than others, though
Although we all have sa.Sa falls under spectrum of symptoms.As other people have said some people might have problem with somethings but not have a hard time with other things.Just because you have sa does not mean you can't be confident in some things and if you have sa you chances are you will have low self esteem in something.