YOU SAID:

he isnt the one for me

INTO JAPANESE

彼は私のための 1 つではないです。

BACK INTO ENGLISH

He is not the one for me.

INTO JAPANESE

彼は私のためのものではないです。

BACK INTO ENGLISH

Is not he the one for me.

INTO JAPANESE

彼は私のためのものです。

BACK INTO ENGLISH

He is for me.

INTO JAPANESE

彼は私のためです。

BACK INTO ENGLISH

He is for me.