The hyper-rational type of people here are more likely to believe in the absoluteness of their own perception of reality and therefore are less likely to seek treatment. If you're a hold-out and apparently in need, truly you'd be surprised how much medically-manipulated brain chemistry can improve your quality of life. A person's emotional world is highly plastic but successfully changing it requires the precise knowledge and quality control that is provided by a doctor and medicine.
Except in severe depression, antidepressants have no clinical advantage over placebos:
http://www.thedailybeast.com/newsweek/2010/01/28/the-depress...
According to Kirsch, antidepressant trials were also compromised by side-effect leakage: the drugs had side effects while the placebos did not, so patients knew when they were not taking a placebo. That's the equivalent of putting your finger on the scale. As far as I know, there has been no attempt to measure that distorting effect (Kirsch only mentions it), nor any clinical trials of antidepressants conducted on a level playing field, where the placebo had similar side effects to the drug. But I haven't searched, and if such studies exist, I'd welcome correction.
ECT can have a much better effect in these cases.
http://www.mayoclinic.com/health/electroconvulsive-therapy/M...
http://www.cbsnews.com/8301-504763_162-57400793-10391704/ele...
And, it turns out, antidepressants can help ECT:
http://www.sciencedaily.com/releases/2009/07/090706161300.ht...
But keep in mind that ECT is only for crisis-level severe depression:
> ECT uses an electrical stimulus to the brain to induce seizures. It is prescribed for patients with crisis-level severe depression – who are catatonic (people who are so slowed down that they stop moving, talking and eating) or suicidal – or for patients with major depression who have not responded to medication.
A psychologist will help you identify the root cause of your depression in a calm, non-judgemental atmosphere. He or she will explain to you how the various defense mechanisms in your mind work and how they can result in the types of thoughts and thought patterns that led to your depression. A good psychologist will help you see for yourself what is wrong and how to fix it.
There are lots of off-patent medications that don't cost a fortune and can make a huge difference in quality of life for people who need them.
Either way a statement like "I'd rather be a zombie than continue on as I do today," made in earnest, sounds like someone in need of help.