YOU SAID:

i want my best friend back. Im in love with her, but she doesn't know.

INTO JAPANESE

私は私の親友が戻って欲しい。私は彼女と恋に落ちているが、彼女は知らない。

BACK INTO ENGLISH

I want my best friend to come back. I'm in love with her, but she doesn't know.

INTO JAPANESE

私は親友に戻ってきてほしい。私は彼女に恋をしていますが、彼女は知りません。

BACK INTO ENGLISH

I want my best friend to come back. I'm in love with her, but she doesn't know.