Why don't you just walk over, or call his parents, or call him...
I don't have his parents' number so I can't call his parents but I'll try to call him now
if i was your friend i would probably fake my death so you stop spamming me AGH
to clarify I just spammed him now to get his attention since the indicator would go crazy
he has been inactive but "online" for weeks and this is about the third time I spammed him
other times I would just message "hello?" and then "DUDE" and then "GOD DAMN IT"