I think that all you can do is talk about the good times you or his friends and family had with him while he was alive and be thankful for that. It's tragic, and there's nothing you can do to make it better, really. Only time can do that. But just remembering that person, and maybe planting a tree in their name, or going out and doing a good deed that would have meant something to that person may help? I feel that religious people draw out the grief by planning to see that person in heaven. They never get closure. If you picture the deceased person watching you all the time, how creepy is that???