But I have no problem whatsoever interacting, and have zero social anxiety. Need me to talk in front of a group? Sure! Meet new folks? Great! And I genuinely enjoy doing these things. But it burns a lot of mental energy to do so. I need quiet alone time, too, and a lot of it.
I say this not to make anyone feel bad about social anxiety, but rather to try and make people not feel like introversion is a defect. It is not, in any way, shape or form. So seriously, don't beat yourself up about feeling introverted, if that is how you are. Anxiety is a different beast, and working on that will help. And if you get it under control, and still enjoy an introverted lifestyle, that is 100% OK, normal, and healthy.