YOU SAID:
I'm in love with someone.
INTO JAPANESE
私は誰かに恋をしています。
BACK INTO ENGLISH
I am in love with someone.
INTO JAPANESE
私、他の人を愛してるの。
BACK INTO ENGLISH
I am in love with someone else.
INTO JAPANESE
私、他の人を愛してるの。
BACK INTO ENGLISH
I am in love with someone else.
That didn't even make that much sense in English.