YOU SAID:
i am not happy are you?
INTO JAPANESE
私は嬉しくないですよね?
BACK INTO ENGLISH
I'm not happy, am I?
INTO JAPANESE
幸せじゃないですよね?
BACK INTO ENGLISH
Aren't you happy?
INTO JAPANESE
嬉しくないですか?
BACK INTO ENGLISH
Aren't you happy?
That didn't even make that much sense in English.