YOU SAID:
I don't know what i would do if you ever left me
INTO JAPANESE
あなたが私を離れた場合、私は何をするかわかりません
BACK INTO ENGLISH
I don't know what to do if you leave me
INTO JAPANESE
あなたが私を離れた場合、私は何をすべきかわかりません
BACK INTO ENGLISH
I don't know what to do if you leave me
That didn't even make that much sense in English.