YOU SAID:
Let's just be friends
INTO JAPANESE
ちょうど友達になろう
BACK INTO ENGLISH
Just be friends
INTO JAPANESE
友達でいられる
BACK INTO ENGLISH
Be a friend
INTO JAPANESE
友達になります。
BACK INTO ENGLISH
Become a friend.
INTO JAPANESE
友人となってください。
BACK INTO ENGLISH
Please become a friend.
INTO JAPANESE
友達になってください。
BACK INTO ENGLISH
Please become a friend.
That didn't even make that much sense in English.