Well, a regular doctor would not just diagnose him over night. It would take a psychologist or something to work with him and diagnose him. They don't diagnose after ONE appointment.
Also, depression is anger, turned inward. If he is truly angry and does not get help, it could turn into depression. Do you see him as depressed?
Sounds like he might be dramatic and playing the victim. His story sounds too vague. Perhaps he is just seeking your attention?
"There's a big difference in playing the victim than in causing your own personal drama." -BK