That's sad to hear... Maybe there's still a chance for you to meet again? They must answer the call at some point, right? Sadly, something similar's happening to my friends but I keep pressing on them to gather on our little meetups. We're still very young and none of us made a career yet so I guess it's easier. I've still lost one group of friends and can't break the wall that grew with all those years but one thing I know for sure - I don't want this to happen ever again. That's what I also wish for You man.