YOU SAID:

Now youre just somebody that i used to know.

INTO JAPANESE

今、あなたは私が以前知っていた誰かだけです。

BACK INTO ENGLISH

Now you are only someone I knew before.

INTO JAPANESE

今、あなたは私が以前に知っていた唯一の人です。

BACK INTO ENGLISH

Now you are the only person I knew before.

INTO JAPANESE

今、あなたは私が前に知っていた唯一の人です。

BACK INTO ENGLISH

Now you are the only person I knew before.