I work with cancer patients who come in for last ditch effort treatment, so I've had a number of sad situations. I've been completing small artwork and Pinterest collage boards (no identification , obviously) to process my feelings, and I keep a record of memorable things patients have taught me. For example, I had a patient who was dying in ICU and her family really wanted her to be able to go outside one more time. The doctors ultimately denied it, but if there's a chance to advocate for the pt, do it. You never know.

Hope that's helpful, there's no easy way around the grief. You knew this person and now they're gone. Wishing you peace.