A good way to see the difference between intro- and extraversion is as follows.
Introverts have a lot of inner tension. That starts when they are toddlers. They constantly have something to think about, thus they need more alone-time than others to sort themselves out and work with their inner life. Talking to others is fine and rewarding, but recovery time is needed afterwards, so they choose their communication carefully.
Extroverts have way more inner peace. They don't need much time for themselves, they often get bored being alone. So they seek out other people for stimulation. More often than not they seek out introverts, because those are especially interesting. Talking to others is refreshing for them, it refills their batteries.
So if you see yourself on the introverted side, don't worry about it. Just accept it and give yourself the peace you need. Invite more or different guests, so they can talk to each other, while you are busy with someone.