There is the kind of happiness that is the excited, elated type, and it's great to experience. It comes when we achieve a goal or acquire something, during a moment of excitement or when our life seems finally on track. This type of happiness is always associated to 'objects', whether material or mind-made. Every object comes and goes, they are therefore unreliable, constantly in a state of flux. The object and it's associated happiness can disappear or turn into despair in a blink of an eye.
Then there is 'soul/spirit' happiness, you might say 'from the heart', and it can include being happy with and for others. This is a deeper form of happiness and it comes from beyond the mind, for example 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 object or 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 you or any object. It just arises as if from nowhere. We all feel or glimpse it occasionally - a kind of profound lightness. It could be approximately described as like a wave of openness, peace and love outflowing - but in truth, it is beyond words to adequately define. When it comes over us, we know intuitively it is not connected to anything external, but it seems always to be when there is space for it inside, when the mind is open enough to let it in. The flowing expression that arises can bring tears - it is 'pure happiness', and you know you have tasted the essence of your truth, the absolute self as it is.