Sorry to hear that. I think your sitaution is a bit different, because you had people around you who were sad, so their emotions rubbed off onto you. No such thing for me.
It's normally sad when something like this happens, but it's just an odd feeling to not even think about it, I mean, I have literally forgot about him dying a few times since I posted this, got distracted like nothing has happened.
It's very strange, but is so natural.