I think, without knowing anything about your situation (just responding as an RN recently retired who signed up to volunteer if needed during this pandemic)---?"right to suffer" would hit me the wrong way, offhand it sounds a bit cold. (like he may need to distance himself from your feelings/situation). It is common, if not "realistic", for health care workers, especially those on the front lines to take death/bad outcomes to heart, and to wonder if we could have done more or made better decisions. It is a normal human response---and right now, the lack of control over this situation will cause anxiety, sadness, anger, .... Keep talking with him & decide if he is a good fit for you---
(I would recommend setting aside a couple of half hours or hours a day to practice relaxation/yoga/mindfulness/exercise/music immersion And to allow yourself to feel, to grieve, and to ultimately know you are human and doing the best you can in difficult times no matter what your own issues are...) This is also a time that can try some relationships.
Thank you for the work you are doing! Please just don't neglect yourself and your colleagues (do you get time to talk with your team & share experiences? this can even be built into "report" time...) Hang in there, I think your feelings are always valid.
What you do with them is all you can (with practice---and never perfectly) guide/control.