Depression
Depression in psychology and psychiatry refers to long term and persistent feeling of sadness, guilt, hopelessness and thoughts of death. A depressed person cannot just 'snap out of it' - he needs support from his family and friends, and sometimes counseling and medication can help too.
This online support group for depression will help you realize you are not alone - join up, help others going through the same road as you are, find help for yourself, and meet professionals who know about the condition too.
"It is a time when one's spirit is subdued and sad, one knows now why; when the past seems a storm-swept desolation, life a vanity and a burden, and the future but a way to death."
-Mark Twain