Not sure what to do...

I have a World Issues exam tomorrow morning at 9, and the teacher for that class is known for super hard tests and exams. I text one of my friends jokingly asking if he's ready for it, and this was his reply...

We talked for a bit, and he definitely blames himself (at least partially) for it. He hasn't told me any more details, and I'm not gonna pry, but I hate being unable to help more.

I've told him I'm available if he decides he wants to talk about it at all, but I'm not overly hopeful that he will decide to open up, as guys often dislike showing when they hurt (emotionally)