YOU SAID:
I just can't believe we ain't together
INTO JAPANESE
私たちが一緒にいないなんて信じられない
BACK INTO ENGLISH
i can't believe we're not together
INTO JAPANESE
私たちが一緒にいないなんて信じられない
BACK INTO ENGLISH
i can't believe we're not together
That didn't even make that much sense in English.