You may feel that getting through the day has become a chore.
You may sleep too much or simply cannot sleep.
Things that you used to enjoy are no longer giving you pleasure.
You may be isolating yourself from others.
You may feel that it is becoming harder and harder to concentrate on tasks that seemed simple before.
You may be suffering from depression. You are not alone. Therapy is highly effective in treating depression. You will learn that there is nothing "wrong" with you. Rather, you are suffering from an illness like any other.
"The word 'happy' would lose it's meaning if it were not balanced by sadness."--- Carl Jung