Expressing Happiness is an expression that is used to show that someone or people are glad have excited feelings.
>> Some expressions of happiness
* I’m happy
* I’m (very) pleased / (really) delighted.
* I’m so glad to hear that.
* Terrific !
* Great !
* Exciting !
>> Expressing Happiness : Formal
* I can’t say how pleased I am
* It’s an outstanding adventure.
* It gives me great pleasure.
* I’m really happy.
* It’s an interesting experience.
* It’s a sensational trip.