YOU SAID:
Hello, would you like to be my one and only friend?
INTO JAPANESE
こんにちは、私の唯一の友人になりたいですか?
BACK INTO ENGLISH
Hello, do you want to be my only friend?
INTO JAPANESE
こんにちは、私の唯一の友達になりたいですか?
BACK INTO ENGLISH
Hello, would you like to be my only friend?
INTO JAPANESE
こんにちは、私の唯一の友達になりたいですか?
BACK INTO ENGLISH
Hello, would you like to be my only friend?
That didn't even make that much sense in English.