There is the kind of happiness that is the excited, elated type, and its great to experience, but it is important to realise it comes from the ego and will soon pass. This egoic mind/body sense of happiness comes when we achieve a goal or acquire something, during a moment of excitement or when our life seems on track. This type of happiness is always associated to 'objects', whether physical or mind-made. It is therefore short lived and unreliable, constantly in a state of flux. It can disappear or turn into despair in a blink of an eye.
Then there is soul/spirit happiness that includes being happy with and for others. This is a deeper form of happiness and it comes from beyond the mind, for example from the profound connection formed in an enduring relationship that is founded on trust, respect, love, or it can have its roots in gratitude and appreciation for a beautiful experience, a glorious sunset, being in the company of true friends. This kind of happiness is more stable because it is not entirely dependent on an external experience, although it is prompted by one. This kind of happiness is more like a love feeling and can be seen in you by others.
Thirdly there is a kind of happiness that is perhaps better described as joy, or even ecstasy, that emanates from somewhere beyond...it just arises as if from nowhere. It is more difficult to describe. We all glimpse it occasionally - a kind of profound lightness, it can be a peaceful moment that is beyond words to adequately define, or at the other end of the scale, uncontrollable laughter. When it comes over us, we know intuitively it is not connected to any particular external object or event. It comes from within, deeper than we can explain, and always when there is space for it inside, when the mind is open enough to let it in. This happiness is an outward flowing uninhibited expression - it can even bring tears - it is 'pure happiness', not associated with anything in particular.
When this comes, it is a sure sign you have tasted the essence of your truth, the absolute self as it is.