The more I think about it, the decision to start focusing on yourself more than others is often triggered by a great change in your life. And it can be a good or a bad change. Maybe you experienced a breakup or some form of rejection.

Maybe you graduated and are entering a newer, scarier stage of your life. Maybe you are overwhelmed with all the activity that is currently in your life. In any of these cases, and others unnamed, focusing on yourself is the best remedy.