past is past...don't come again plzzz!!!!

huhu...past is past right????
everyone don't want bad thing happen back...
so..plzz don't come again to me...
i want a peace and simple life....
without u i can life with happiness..
without u also i can smile.....
without u also i can be independent..
but, why u come again...
i don't want it happen again...
plzz...leave me alone....