If there is unhappiness in you, first you need to acknowledge that it is there. But don't say, "I'm unhappy." Unhappiness has nothing to do with who you are. Say: "There is unhappiness in me." Then investigate it.
A situation you find yourself in may have something to do with it. Action may be required to change the situation or remove yourself from it. If there is nothing you can do, face what is and say, "Well, right now, this is how it is. I can either accept it, or make myself miserable."
The primary cause of unhappiness is never the situation but your thoughts about it. Be aware of the thoughts you are thinking. Separate them from the situation, which is always neutral, which always is as it is. There is the situation or the fact, and here are my thoughts about it.
Instead of making up stories, stay with the facts. For example, "I am ruined" is a story. It limits you and prevents you from taking effective action. "I have fifty cents left in my bank account" is a fact.
Facing facts is always empowering. Be aware that what you think, to a large extent, creates the emotions that you feel. See the link between your thinking and your emotions. Rather than being your thoughts and emotions, be the awareness behind them.
Don't seek happiness. If you seek it, you won't find it, because seeing is the antithesis of happiness. Happiness is ever elusive, but freedom from unhappiness is attainable now, by facing what is rather than making up stories about it. Unhappiness covers up your natural state of well-being and inner peace, the source of true happiness.
Eckhart Tolle