People often say, "I wish I had told them I loved them" the last time they spoke with their loved one. Instead of worrying about the last conversation, consider remembering the best conversation. https://youtu.be/mTelNU4nz30
https://youtu.be/I66jHbOCfow Jason's book is How Trees Deal with Loss.
I used to say, "I'm sorry for your loss" when I was in moments of deep pain and death. I'm adding a new phrase. "This is hard." Let me tell you why. https://youtu.be/T9EeLPR3v4k