YOU SAID:

If I know you, you'll make him change before letting him change you

INTO JAPANESE

私があなたを知っているなら、あなたは彼にあなたを変える前に彼を変えさせます

BACK INTO ENGLISH

If I know you, let him change him before changing you

INTO JAPANESE

私があなたを知っているなら、あなたを変える前に彼に彼を変えさせてください

BACK INTO ENGLISH

If I know you, let him change him before changing you