The difference between the english phrases happy about (something) and happy with (something) lies in how we express our joy or satisfaction. But i am happy is also used to describe a general satisfaction with life, as the opposite of i am. Pleased, glad,glad and happy are closer in meaning.
Al Horford First Dominican NBA Champion
|@aakritisingh649 happiness is a noun. But we don't usually say this, and it's kinda weird and too formal. We often just use english phrase.
Happiness happy is the adjective happiness is the noun.