You might email him this or another of the thousands of online groups. I look around me here, so to speak, at how many of us maximize our connectedness to a larger group of souls than we would otherwise maintain. He might find it's one more outlet/input exchange that helps him with perspective.

It probably is awkward trying to maintain the clarity of "ex" status while he feels so bad, and you have to be ok yourself. It's always one or the other of the "ex's" feels somehow worse about it than the other, but the other isn't automatically immune to feeling bad either.

Your sweet to care and be so kind.