Happiness is a feeling in which love is satisfied.
A sense of well-being is also a kind of happiness.
Happiness is the emotion branching out from love's appraisal. Happiness is an emotion in which the current status of love is appraised.
It is assumed that a newly married couple is happy during their wedding ceremony. The object of love is present, and the love is reciprocated. This is mutual love. Happiness is thought to be the degree of feeling satisfied with love's behavior. Of course there is no need to limit this to the relationships between men and women. Since love is an altruistic behavior without compensation, happiness will occur when altruistic behavior without compensation is mutual.
In happiness people let go of their wariness, and rest both physically and mentally. It also causes their life style and pattern of thinking to stabilize. Happiness maintains success by not changing, which is to say a person becomes conservative.