YOU SAID:
I'm in love with someone who's not in love with me
INTO JAPANESE
私は私に恋をしていない誰かに恋をしています
BACK INTO ENGLISH
I'm in love with someone who isn't in love with me
INTO JAPANESE
私は私を愛していない誰かに恋をしています
BACK INTO ENGLISH
I'm in love with someone who doesn't love me
INTO JAPANESE
私は私を愛していない誰かに恋をしています
BACK INTO ENGLISH
I'm in love with someone who doesn't love me
That didn't even make that much sense in English.