EDIT : Great work making a mock of this thread,
http://www.sythe.org/sports-health-fitness/1832809-i-cant-eat.html, since you copied everything about it just switching drinking and eating accordingly. To think I spent time on you, you sicken me
You can't drink anything, like water, juice, and what have you? Are you claiming it is because of depression? because that should mainly effect your eating (loss of appetite), the drinking part is just a suicide attempt, so yes you should go to the hospital if you don't plan on hydrating yourself.
I would suggest water, since most people have a handy faucet that spews the shit. Cup your hands and fill em up and take a swig.
Of course since your body is currently drinking itself you'll feel like shit till you shrivel up into a raisin and die, or until you decide to drink something, or someone finds you passed out and the bill from the ambulance ride to the hospital gives you a real reason to be depressed.
Unless of course when you say drinking you mean alcohol, which is a great cover up for depression. Just edit my post with your eyes and any time I talk about water or hydration change it to something alcohol related.
Last but not least, try some other form of self medication (alcohol, marijuana, sex, masturbation, combination of all at the same time) or even go to the doctor and have them prescribe something for you.