It wouldn't be a good idea to discuss this any further with the mutual friends. Best just to let it go or as you say, it would only make matters worse.

Maybe he, like many men, is quite private and there's a good chance he really did not expect you to solve things for him; but maybe he just needed someone to listen and kinda vent and felt he could do that with you. Try, if possible, not to bring this matter up because it just reminds him all over again. It's just going to take some time for him to get over this. Hopefully it will become a faded memory.

Take care of yourself.
Ger