It's possible that your level of male hormone is low, and you should have it checked, but do approach supplementation cautiously. You should have both morning and free testosterone tests, and they should be repeated if they're low. There are significant complications and side effects to unwarranted testosterone supplements. In fact, only about 5 percent of my patients who have problems similar to yours actually need more testosterone. If you are depressed, you're definitely not alone.
Depression is far more common among men than most people think.
Each year 24,000 men commit suicide, and most of them suffered from depression. I'd like to know, and your doctor should ask, if you're experiencing any of the other signs of depression besides lack of energy and loss of interest in sex and other pleasurable activities. Those include poor appetite, disturbed sleep, feelings of worthlessness and futility, and suicidal thoughts. One of the reasons that men commit suicide at four times the rate of women is that they tend to blame themselves for their depression. They figure that it's something they've earned through failure, such as loosing a job.