Expressing Happiness

Expressing Happiness:
-I'm happy...
-I'm (very)pleased / (really) delighted (about)...
-I can't say how pleased / delighted I'am about it
-Great!
-Terrific
-Fantastic

Example:

I'm very happy because how I can get together with my old friends.
Oh, how I miss them... I see that their appearances have not changet. Anton, the Winner Of The Piano Competition, is playing us romantic music.