“To be real is to be vulnerable, and this takes courage, especially if we believe that others will like us more if we hide or distort who we truly are. Technology can promote this belief by making it easy to pose online as someone braver, happier, better looking, and more successful than we really feel. These poses, in fact, are a form of social withdrawal. They may let us pretend that we’re more accepted, but the pretense only intensifies our loneliness.”