Radiant Kim Kardashian has that new romance glow at her book signing... as she admits 'It's hard to stay single'

http://www.youtube.com/watch?v=wp06e4pi4C8endofvid[starttext]By DAILY MAIL REPORTER The look of love? Kim Kardashian was radiant yesterday at a book signing with her sistersPlenty of people can relate to the excitement of a brand new romance.And Kim Kardashian certainly has the radiant glow of a woman in the early, butterfly-inducing stages of love yesterday.The 30-year-old put in a glamorous