When I'm feeling confident or happy, I'm a mega extravert. When I'm In a mellow mood,?

You seem normal. Most people have times when they are social and talkative, and there are others when they need "me" time and want to be alone and calm. Also remember these are just labels, just be yourself because that's all that matters. If you need a more active social life then do more social things, go hangout places with your friends or get a job or volunteer somewhere where you can be social, anything that doesn't let you spend time alone, that is how you get a more active social life.

well it means when you are happy, you are more open to others.
just be yourself. you're ok now.
I think it's best to leave things the way they were.
you don''t need to change anything, just let things flow.