Glen, stand your mate up and look him in the eye and tell him "get over it"
Before you all start abusing Aussie Bob, consider this: All WW1, WW2, and Viet vets were told exactly this and it worked for most. Personally, I have seen friends smashed to bits in road crashes (first on the scene) and walked away from a major air crash where another was critically injured.
"Get over it" can be good advice. Counseling is a new age idea best suited to weak minds.