You should seek professional help if you are suffering from depression. If you are having serious thoughts of suicide, call a crisis hotline in your area, or go to an emergency room. Keep in mind that depression is very treatable. I have been working on research studies for over 15 years now, and I know that many people are reluctant to seek treatment, or take medication. I often tell these people that they wouldn't think twice about taking medicine if they were a diabetic, or had hypertension.
Depression is a neurochemical disorder involving a brain chemical known as serotonin.
It is therefore, no less medically valid than other diseases of the body. It always strikes me as tragic, when people lose a lifetime to depression. It is a needless waste, which I have witnessed professionally, and personally. I watched my father spend an entire lifetime in what I now understand to have been an untreated depression. I see patients come in for treatment after years of stubbornly and stoically, suffering in silence.