For all of the excitement and praise you receive on graduation day, no one ever thinks to warn you about how sad it really is to graduate. In between the “You did it’s” and the “We’re so proud of you’s” is just the most frightening mixture of nostalgia, fear and lack of control. I felt it yesterday, sitting at my dorm room window, looking over the field as the maintenance staff of Boston University cleaned up discarded water bottles, graduation ceremony programs and graduation caps that were thrown into the air one minute and then left behind the next.