See a doctor. As long as you still care enough to actually see one. And by doctor, I mean a therapist. Get a prescription, too, if it makes sense - but often, behavioral therapy is a better way out.

Let somebody close to you know - so they drag you to the therapist when your really don't care any more. And, more importantly, so they can watch you when you take antidepressants.

Far from being the magic happy pills they're described as, there's a good chance they just turn you into a zombie who's feeling OK about not caring at all.