I don’t think there is anything wrong with you crying over losing a patient you care for or for their families who loved them as well. We are nurses and we are also human. The nurse who told you that probably felt awkward or maybe she is hardened for we all deal with things like death differently. I wouldn’t be concerned about crying over a lost patient unless losing these patients causes you to become depressed or unable to perform your duties as a nurse. Death is sad sometimes and something we all deal with eventually as nurses or just human beings.