I lost my best mate in a road accident 3 years ago - it hit me hard as I grew up with him and knew his family really well. Seeing them suffer sucked big time. Everyone dealt with it differently - some God, some afterlife etc.
I don't believe in any of it, but I am happy in the knowledge that he lives on in his friends and families memories. If you are a good person, then you'll be remembered as such - and he was.