请高手来翻译下?

If that day come,you want walk away,or maybe now,promise me,you will remember me,If this make you upset,then you can forget about it.you can think all thing doesn t happened.

有的人不要含血喷人，虽然我的英文不好，但是我绝对不用机器翻译，我不过是希望练习一下。

If that day has come,you wanne be away,maybe now,promise to remember me,If it make you unhappy,just forget it,seems it has never happened

一楼的是机器翻的，楼主不要乱用：

If you want to leave me someday or maybe now, promise me that you will remember me. If that makes you sad, just foret it, like this never happened.

if some day,maybe today, you want to leave me, promise me that you will remember me, but if that makes you feel sorry, forget everything happened between you and me.

翻得都差不多啦!