How can people see the changes in me (how can I convince them) without going to the extreme?

The thing is, what do you want? People's "concern" has actually pulled you off of your rails. You are probably very intelligent. The people around you are not supporting that. You are self-directed with your books and computer; in a group, you're like, "Okay, I'm all yours!" --- where you're not drawing any benefit off of it -- not really hitting it off with people -- not that it's your fault bcs maybe they all bore you, or the subject never goes to something that sparks your interest --- it may seem impolite to say, but sometimes it's true, and still it seems like you have a small world of home and church to operate in. Thing is, the "extrovert" thing -- they thought they were pointing it out for your own good, now you've been fooled into trying to prove this to them, rather than getting on with your own interests -- where you're supposed to have just enough extroversion to pursue your own interests. You sound a little exasperated. You've been misled -- get in someone's face and say, "Am I extroverted enough for you?" They'll have you babysitting next, bcs now they've got you mulling around, "directionless," because they never saw the rich inner world in which you were developing yourself, and interfered w/o really caring all that much. They have succeeded in exploiting your desire to please them, and your willingness to believe they know better than you, and that they're acting in your best interest, to waste your time, without anything to offer back to you. Cut out.