YOU SAID:
If you can't be with the one you love, love the one you're with
INTO JAPANESE
愛する人と一緒にいられないなら、一緒にいる人を愛してください
BACK INTO ENGLISH
If you can't be with your loved one, love your loved one
INTO JAPANESE
あなたがあなたの愛する人と一緒にいることができないならば、あなたの愛する人を愛してください
BACK INTO ENGLISH
If you can't be with your loved one, love your loved one
That didn't even make that much sense in English.