While it's very painful for him, I think it's so important that he told you he's identifying some of his own problems. Good to trust your gut - as it seems like it took you in the right direction - being a supportive friend can be so hard - but it seems to be something her needs but just doesn't know how to ask it of you.
...on a cautionary note...I once had a similar conversation with me wife...and it seemed like we had talked about a lot of things that really needed to be addressed...only to have her turn that conversation on its head a couple days later - and use it as proof that I don't believe in her...my mistake was that I did too much talking...and should have listened more...it seems like you're listening so well - and are sensitive to what you hear him asking of you - even if he can't say it outright.
Were you able to get out for another run today?
Has he said anything about the suicide at his firm?
