I would say that no one in this world is 100% happiness. Sometimes I feel that's bad and sometimes I feel like that's just the way life is supposed to be. Without darkness, light would have no meaning and so without sadness, we wouldn't know the value of happiness.
Having said that, no, I don't think that I am truly happy. But hey, I am not alone! We are all looking to live that ever elusive truly happy life.