Common symptoms are attributed to loss of appetite, loss of concentration, changes in sleeping patterns, restlessness or decreased activity that is noticeable to others, feelings of fatigue or having little energy etc. Untreated depression can be fatal as experienced in many a case. It is necessary that we learn to cope with and respect those affected. Talk to a counselor today if you find yourself even mildly affected. The easiest ways out for years have been smoking and alchohol consumption.
Depression is recognized as a medical condition and there is no substitute for therapy.
Before I conclude, I would like to add that you as a person, are the most precious asset to yourself. Treat yourself right and you will not be sorry. Believe in yourself, have confidence and live life kingsize.