(Teachings from Gita) We've desires and when any of our desires get fulfilled we "feel" happy. Most of our desires are about procuring something; getting a new job, car, house, so on and so forth. This is what we perceive as happiness; but such happiness is short-lived. A new job doesn't remain new after a year, same for a car or a house, then the happiness fades away and we desire for other things that we feel would make us happy. Such desires are in fact harbingers of anger and jealousy. Have we ever thought about why we get angry? It's mostly when we realize that there is a stumbling block in our path to the fulfillment of a desire. It's because of these desires that we tend to compare ourselves with out friends/neighbors/peers/etc. with regard to various possessions and hence give birth to the feeling of jealousy. We should seek everlasting happiness and not such ephemeral happiness.
Happiness experienced as a result of appeasing your senses is ranked the lowest as it gives rise to various vices and is not even the "real" happiness. The next level of happiness is for the one who's detached himself from all worldly things (vairagya). Once you detach yourself you don't experience the feelings of attraction or repulsion and with that you've successfully repelled the vices of temptation and anger. On a still higher level is the happiness which comes to those who desist from sensual enjoyment and have an absence of desires (uparati) and the ultimate state of happiness is achieved by the one whose soul is in unison with the Supreme One.