Your search for 'happiness' is actually the search for something else ...

Certainty. Your search for happiness is actually your search for something immutable; something that doesn't change. 

Think about it: most people are people who WILL be happy. This means they are not happy yet. Are you happy? Do you delay your happiness continuously into the future? If you are doing this, the reason is that you are looking for something that doesn't change.

Have you discovered that which does not change? Something mathematical like 2+2=4. If you haven't, keep searching. Don't give up. Happiness equals achieving final peace and gaining certainty. Keep searching until you find it.