There are some things people arguing against professional help should try to understand: not every treatable and serious negative psychological condition is depression; you don't go to a doctor only if you have cancer; occasionally you can succesfully treat serious diseases without professional help - that doesn't make it a good idea. So yes, maybe he'll just get over it and start living on his own, but if he wants to actually better his chances then he definitely should seek help. Good psychiatrists are definitely capable and willing to assess if he really needs help (and what kind of help).