YOU SAID:
I cannot believe that you would break up with me
INTO JAPANESE
あなたが私と別れるなんて信じられない
BACK INTO ENGLISH
I can't believe you part with me
INTO JAPANESE
あなたが私と別れるなんて信じられない
BACK INTO ENGLISH
I can't believe you part with me
That didn't even make that much sense in English.