Actor Robin Williams mezmerized me the moment I saw him on “Mork and Mindy.” Other girls in my junior high school had crushes on the Dukes of Hazzard hunks, or Leif Garrett, but for me, that crazy alien from Ork was who I imagined hanging out with for great weekend fun. His death by suicide this week has stunned the world. How can someone who brings such joy to others possibly be depressed?