Talking to someone that understands where you're coming from and what you're feeling I think is helpful.....the feeling of being utterly alone and completely misunderstood in the universe can weigh heavily on the depressed psyche.
I think talking to people who are not so close can help; People who will not judge, nor increase the weight of responsibility that is living. In addition, of course, a medical follow-up; But the first step should always be to have an opportunity to talk.