I suppose I'm maturing even better than I thought. It used to bug me when I left someone a message and they didn't reply. Now I just shrug it off and go on with my life. Why worry about things you have no control over?
My life will not fall apart over one missed message reply. I suppose that's why I don't give a rats ass about idle gossip at work any more, or about who's sports team won whatever game, or about politics.