If you feel tired and jaded and have little enthusiasm for life, it is possible that you aren't making time for fun. We all get into a grinding routine of getting up, going to work, coming home, doing more work, going to bed.
Leisure time is vital in order to keep enthusiasm for the other aspects of our lives.
We have a right to this free time but often feel guilty about taking it. Work off tensions by gardening, pursuing a hobby, or joining a club. Take time to be alone, doing nothing. If some or all of the above apply, then you may be suffering from burnout. You may need to get professional help from a trained counselor or therapist to overcome burnout.