I'm kinda in the same situation as you, I always thought of myself as an introvert. But then I started to think if it's just my social anxiety that makes me act more as an introvert would. So I asked some friends and those who are closest to me and knows me the best and also know about my social anxiety says that I seem more like an extrovert in their eyes.

And to me, that does actually makes sense since I do enjoy being social with others but my social anxiety often holds me back from doing this. I also don't enjoy being alone for too long, like I will feel low on energy (something that has become very clear now with the pandemic). When I am with my closest friends that I feel comfortable with I will suddenly change into this outgoing and talkative person, that is if we are somewhere private, in public I will withdraw instantly if there's a lot of strangers around.

With that said it's not like I can't stand being alone by myself, I can quite often enjoy it truth be told, but not for long periods of time. So I think I am an extrovert and my social anxiety is what's keeping me back from truly being that way. But I also wouldn't say that I am this super extroverted person either. So I'm not too sure honestly...