YOU SAID:
Brandon is sad because he broke up with his girlfriend
INTO JAPANESE
ブランドンはガールフレンドと別れたので悲しい
BACK INTO ENGLISH
Brandon is sad because she broke up with her girlfriend.
INTO JAPANESE
ブランドンは彼女のガールフレンドと別れたので悲しいです。
BACK INTO ENGLISH
Brandon is sad because she broke up with her girlfriend.
That didn't even make that much sense in English.