Ok this is interesting. All you’ve shared is that someone is sad, you don’t know what he wants and you don’t know what to do. I’m thinking that this someone is somebody to you.
I read your question earlier and it popped into my mind. I tried putting myself in your position by asking myself why I would ask that question….. Perhaps because I felt like I should do something…. Or I felt like I could do something.
You’re a caring person and he’s lucky to have you 🙂