YOU SAID:
I can't believe she is in love with somebody else
INTO JAPANESE
彼女が他の誰かに恋をしているなんて信じられない
BACK INTO ENGLISH
I can't believe she's in love with someone else
INTO JAPANESE
彼女が他の誰かに恋をしているなんて信じられない
BACK INTO ENGLISH
I can't believe she's in love with someone else
That didn't even make that much sense in English.