Unfortunately as one gets older some don't.
Put another way, eventually you will see friends and peers stop ageing as they die. In a way, you expect older family members to pass away as they are older than you, but as peers pass away it perhaps highlights your own mortality a little more.
The morning of my birthday recently, I found out a friend with whom I spent many great days sharing adventures, had suddenly passed away of a massive heart attack. Luke is the one in the middle.
RIP Luke.
