Do i have somthing wrong with me?

About a year ago i was told my first cousin had gotten cancer, and when his feonce heard she broke up with him. When i heard about both of these things i didnt really care. Thanksgiving day i played pool with my grandfather we joked around a lot, later that night he died in the emergency room, we went to see his body and everyone had their cry but me i didnt even go to the brink of crying then or at his feuneral. I havnt cried about anything for a couple of years now and now im wondering is there somthing wrong with me?