Brian,
Take a break. Things will look different in a few years.
In a short period of time, I lost my best friend, my father, my mother and my son. It was devastating. While I have always looked suspiciously at support groups, i attend one to help me through the death of my son. Not only can they help in ways you cannot imagine, it helps to realize you are not alone in your grief. Many others share your circumstances and, believe it or not, there is always someone worse off than you.
While the wounds will never go away completely, the world looks differently to me than it did four years ago.
Take a break from things that make you uncomfortable. As you have noted, you can return, or not, later.
Best wishes,
Larry