Once you have made peace with the present moment, see what happens, what you can do or choose to do, or rather what life does through you. There are three words that convey the secret of the art of living, the secret of all success and happiness: One With Life. Being one with life is being one with Now. You then realize that you don't live your life, but life lives you. Life is the dancer, and you are the dance.
The ego's form of happiness can't exist without unhappiness. The ego will be happy when something good happens but unhappy when it ends.
The joy of Being, which is the only true happiness, cannot come to you through any form, possession, achievement, person, or event - through anything that happens. That joy cannot come to you - ever. It emanates from the formless dimension within you, from consciousness itself and thus is one with who you are.
Is there a difference between happiness and inner peace? Yes. Happiness depends on conditions being perceived as positive; inner peace does not.