Hi J
Really sorry to hear about your friend , we both know how it feels right :(
I think the song your referring to is "Lost" by Michael Buble , it's at the bottom of my signature.
I've always had this song below as my reminder for my Dad , it's by Mike and the Mechanics and it's called "The Living years" I'm sure you've probably heard it before.
YouTube - The Living Years - Mike and the Mechanics