Hiya, Ray! I'll have to go with Aristotle on this one: Happiness ain't merely having the feeling, for the feeling may not be there some of the time; rather, happiness is the state of possessing a good soul.
How does one come to possess a good soul? His soul becomes good when he makes it a point to consistently know and believe in what is true and do what is right and just.
Having all the money in the world is no guarantee that you'll "feel" happy, let alone "be" happy, but I hear it helps.