Find happiness in your antisocial/introverted personality or else you should start forcing yourself into doing social stuff. Like even though you dont really like going out with your friend, do it anyway. Not for yourself but for your friendship to keep going. Or you could just as so many before you, find stuff that you like that does not require other people and live a happy and long life
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This does not really work, since he does have a friend that is trying this, but it seems like he is repelling it.