There are only two things in life that are inevitable: death and taxes. Well, three, if you include the aging which leads to death. In any event, we cannot do anything about aging or death and that thought can sometimes be rather depressing. We will all get old and we will all die.
Even if you manage to keep your mind off of this advancing decrepitude, your body constantly speaks up in the form of nagging aches and pains. Then there are those days when you feel depressed and in pain. All you want to think about is your lost youth and how you know feel that you have squandered it.
When the double whammy hits you, try to get on your feet and get moving. Exercise is not only good to keep your weight down, but it also helps to lower your blood pressure. Meanwhile, your brain is producing feel-good endorphins that will lighten both your mood and your step.
At the same time, try to avoid abusing too many substances. Alcohol may help to calm you down, but remember that it is a depressant. That will simply lower your mood and that is not something you need when you are feeling this way.
It can also be tempting to indulge in comfort food. Unfortunately, as we get older, it becomes more difficult to lose weight because we have less energy and drive to exercise. Putting on extra pounds and then having trouble to lose them is guaranteed not to make you feel better.
Do what you can to avoid stress. It is bad for your blood pressure and can actually prematurely age you. Stress will depress you, which makes you less likely to exercise and socialize, which will just make things worse. It is really the worst kind of vicious circle.