Introversion is just a personality type, as is extroversion. I'm an introvert too, and wouldn't want it any other way.

To me the extrovert seems almost dependent on others for his/her happiness.

I couldn't go that route; I have to find my own happiness within and then relate to others when I feel like it. Otherwise, I'm happy with introversion and there is always something new inside to follow.

You must be creative; I think many artists are, and I think many are introverts, too.