YOU SAID:

So maybe it wasn't my fault but I should have closed my eyes to see that someone might have left the teachers door open

INTO JAPANESE

だから、それは私のせいではなかったかもしれないが、私は誰かが教師のドアを開けっ放しにしたかもしれないことを見るために目を閉じるべきだった

BACK INTO ENGLISH

So it may not have been my fault, but I should have closed my eyes to see that someone might have left the teacher's door open.

INTO JAPANESE

だから、それは私のせいではなかったかもしれませんが、私は誰かが先生のドアを開けっ放しにしたかもしれないことを見るために目を閉じておくべきでした。

BACK INTO ENGLISH

So it may not have been my fault, but I should have closed my eyes to see that someone might have left the teacher's door open.