Death is a natural part of our work. Crying because one of your patients dies is normal and healthy reaction. The more experience nurse has been there and done that I’m sure. It does get easier as time goes along in your career but maybe what she might have meant was that you may need to try to some distance for your emotions for these situations because you can develop burn out and then you will become hard hearted and not care about the patients at all. Which we all know is not a good thing at all for you or them.