Well emotion actually, physical pain can be really hard to handle, but emotional last longer! If I slap you it'll just hurt for a second or so, but if someone u really love would leave you, you'd be like a year or so suffering!
You're comparing apples with oranges. Try being shot in the head and having lifetime injuries where you're mentally retarded for the rest of your life.
Try to lose ur best friend and live the rest of ur life with it!
It would be easier to recover from that, than be mentally retarded for the rest of your life, it ruins your life, and you cant do anything about it. You can recover more with losing your best friend.