I know exactly how you feel. I lost one of my best friends, also male. We had graduated in the same class, worked at the same place and despite some squabbles, were more like siblings. He had gone through dialysis and finally got a kidney. He loved to travel so was able to start doing that again. He seemed to be doing quite well. Next thing I know, he was in the hospital, then gone. I was devastated and It took me months for it to register. It will take time for you to truly believe it.
I had two more shockers involving online friends. One was a former classmate and we connected on Facebook. He'd call periodically just to say hi, maybe talk a little politics and about the good ole days. He and his wife seemed to have a great relationship and life, did some traveling. He called me two days before he passed and said "We have to keep up with each other" and posted on Facebook the morning he passed. I replied to him about something that day. Later when I saw in one of our groups that he had passed, I just couldn't believe it.
Another was my friend Woody. He was one of my first social networking friends from over 16 years ago. I didn't know he was sick. I saw a thread just titled with his screen name on the site we had both migrated to (not Facebook, though we were friends there too) and my dread was confirmed. I couldn't sleep for two nights and tried to wrap my brain around it for several weeks.
This is
hard Ruthanne! I truly hope happy memories of your time together will bring you comfort.