YOU SAID:
i want my best friend back
INTO JAPANESE
私は私の親友が戻って欲しい
BACK INTO ENGLISH
I want my best friend to come back
INTO JAPANESE
親友に戻ってきてほしい
BACK INTO ENGLISH
I want my best friend to come back.
INTO JAPANESE
私は親友に戻ってきてほしい。
BACK INTO ENGLISH
I want my best friend to come back.
That didn't even make that much sense in English.