Happiness can truly be achieved in a dream. In some cultures, to have a happy dream is considered a good omen for the future.
Often, happy in a dream means that our wishes and desires have come true or we are experiencing something positive. Those who experience happiness in their dreams tend to be happier on waking up. Furthermore, this emotion signifies hope and positivity whereas the symbolizes desired things. Finally, the meaning implied from this dream is that we should always trust our inner contentment.