i think "depression" has just become a go-to term these days used by people looking for an excuse to be miserable, who really just need a change of scene/holiday, new job, new wardrobe - whatever. now i'm not saying clinical depression or manic depression are not real - indeed i have first hand knowledge of severe depression via my mother and it can be an awful awful thing to live with - you know what though, she was given anti-depressants - did absolutely fuck all apart from fuck her up more. she herself never wants to go near them again and now does not believe clinical drugs to be effective.
look, if you're in floods of tears every day, can't leave the house, hate yourself to the point of self-harm and are contemplating suicide then yep, you've got a problem and need help. if you just "hate some kid at school", or whatever other inane crap i've heard on here, you need to grow up.