YOU SAID:

If I was you I would never go back on a promise to her.

INTO JAPANESE

もし私があなただったら、彼女との約束に戻ることは決してないだろう。

BACK INTO ENGLISH

If I were you, I would never return to my promise with her.

INTO JAPANESE

もし私があなただったら、彼女との約束に戻ることは決してないだろう。

BACK INTO ENGLISH

If I were you, I would never return to my promise with her.