Decisions, decisions . . . You've survived your first semester and captured the interest of not one but two of the hottest guys on campus. Now who are you going to choose? Callie Andrews returns for her second semester at Harvard determined to do better than the previous fall, where those Bs on her report card seemed pretty good compared to the state of her extracurriculars (F, as in if at first you don't succeed, you should probably stop trying),...