Unhappiness is bound up in so many other issues—the world situation, workplace woes, a person’s problems at home, loneliness. In each one of these concerns, usually a combination of them, unhappiness can become a daily occurrence.
Feelings of resentment toward others fuel discontent which can become a daily occurrence. Looking at things that have happened in the past and not letting go of them blocks the possibility of happiness.
When you worry about things you can’t control, it can cause unhappiness. We worry about what people think of us, what someone at work has assigned us to do We worry about what a spouse will say If we are honest about a situation. If we get stuck in a habit of worry, we cannot be happy.
There is also an issue when someone surrounds themselves with people they don't like.
Three things can help someone who is unhappy -- Let go of as much resentment as you can. Stop worrying about things that are out of your control. Set boundaries on relationships that aren’t working. Doing these three things will help bring back part of your happiness.