YOU SAID:
i am feeling really happy, not
INTO JAPANESE
私は本当に幸せな気分だよ
BACK INTO ENGLISH
I feel really happy
INTO JAPANESE
本当にうれしいです
BACK INTO ENGLISH
I'm really happy
INTO JAPANESE
私は本当に幸せだよ
BACK INTO ENGLISH
I am really happy
INTO JAPANESE
私はとても幸せです
BACK INTO ENGLISH
I'm very happy about...
INTO JAPANESE
私はとても幸せです...
BACK INTO ENGLISH
I'm very happy about...
That didn't even make that much sense in English.