I've lost a friend!

A dear friend who helped edit my book, A Life Reclaimed, passed away last Sunday.  He was 91.  We were supposed to meet for drinks and a light meal on Monday.  I called and emailed him that day, but no reply.  I thought he must have been busy; but it wasn't like him not to get back to me.  This afternoon, I ran into a mutual friend who told me about his passing.  I feel so bad that I didn't get to have a drink with him before he died.