Buddy, there is no glass that's half full or half empty unless you talk yourself into one or the other. Like I told an old COL on Ft Lewis, "status 50%, subject to change Sir!"
Grieve. Think. Ruminate a bit.
Then take the best of what you've received and pass it on. Find a young buck with enthusiasm and take him under your wing.
Cuz that's what happened to most of us right?