Well I don't think most people that just get depressed go to mental hospitals... just the ones that have deep problems that need ----- help.
what you stated is not entirely correct, if you are depressed then you go to see a therapist not a mental hospital. You go there once you've hit insanity and like made several suicide attempts or death threats. Those that said you can get over it, aren't correct either. Some of the people can't get over come the depression because nothing changes or they just give up all together.
You do realize that generally those closest to you are those most responsible for outside influences on your depression, yes?