Happiness is what arises when suffering is not present. It is the state of being that we are born into. It is the state of being that exists when we are not consciously suffering. It is the state of being that we are meant to be in.
I agree with the first sentence, the happiness is mostly an anti-concept; it's the lack of pain plus mindfulness.
But I'm not big fan of pursuing happiness, I always felt that concern with pursuing happiness was a womanly pursuit. I would respect no man that was really concerned with being happy.