
As a baseline just make sure he knows you’re listening. I’d identify what the purpose of him opening up is. Sometimes people just want to vent and be heard, and have their feelings validated. Sometimes people want advice, but they will probably clearly ask if they do. One purpose can also be to show trust and the “level” of the friendship. Finally, don’t let gender change your response much, fundamentally I wouldn’t approach this different than any other friend talking ab their mental health