YOU SAID:
I forgot just why I left you, I was insane
INTO JAPANESE
なぜあなたを置いて行ったのか忘れてしまった
BACK INTO ENGLISH
I forgot why I left you
INTO JAPANESE
なぜあなたを残したのか忘れた
BACK INTO ENGLISH
I forgot why I left you
That didn't even make that much sense in English.