I'm sorry about the loss 8 years ago.

It's very sad that happened, and although I have never lost a close friend, I can sympathize because I've had friends involved in car crashes, lying in a hospital room without learning any news whatsoever.
I don't know what I would do if I actually lost a friend forever... I guess I would just ask for peace, like you did, and make mourning the first thing on my priority list.
If the victim was someone I was very close to, and had known for awhile, I think I'd stop going out and having a great time for awhile. Like a way of trying not to take my life for granted, and appreciate how lucky I am to be alive.