What Is Happiness?
“Most folks are about as happy as they make up their minds to be.” Abraham Lincoln
Happiness and unhappiness are opposite sides of a judgement about your situation. If you judge your situation as bad for you, that's unhappiness. If you judge a situation as good for you, that's happiness.
The experience of happiness is one of those general terms we use to say, "I feel good emotionally." People use different terms to describe what feels good for them. For someone it might be excitement, passion, exhilaration, fulfillment, freedom, feeling fully alive with inspiration and joy. For another it might be more peaceful, content, capable, hopeful, satisfied, and comfortable feeling. Whatever you call it, it just feels darn good.