Losing a friend, particularly a best friend, is just as hard as losing family. You chose them and they chose you, we don't get to choose our families.
Loss is of such a personal nature, it is impossible to relate to someone else's loss without applying our own. And that is not empathy, goes much deeper than that.
I play with words, that's my hobby, but I have no words to ease the pain of loss. I really didn't know loss until 9 years ago and thought I would handle it but I wasn't prepared. Everyone wants to help, offers advice and means well but they truly don't know how you feel, only how they've felt.
When I say sorry for your loss what I mean is that I am sorry you are sad, there is a void in your life and somewhere within you, you try to make sense of the senseless. I've been in the neighborhood where you are but not the same house.
jobber, what I wish for you is to get where Runny is as soon as possible and when you think of your friend, you think of the warmth you brought each other and most of all, the times you laughed. It took me a long time to get there because I didn't know the path. Each of us deals with life and loss differently and if you find this affecting your life, talk to someone in grief counseling. I needed that and didn't realize it at the time.
The only good thing about loss is that it reminds us of what we still have and that takes on a little more importance in our day to day and taking anything for granted doesn't exist for now.