How to get someone mentally evaluated against their will?

I would say you would need to go to the court if you had a valid reason to get someone evaluated against their will, if they were an obvious danger to themselves or others around them.

Depression is lifelong, though you can get medication to with it. the difference between sadness and depression is that sadness lasts a little bit, depression last a long time and it goes on and off. people usually get depression through experiences they have been through, or genetics.