I think for you to really move on and get those hopes out of your head is too fully and complelty know it's over and know that you two cannot work... If you're always holding on to that hope, you're never ever going to heal ever.. I suggest you sit down by yourself.. and maybe pray to your higher being, and ask him to help you move on.. actually say to yourself "it is over, we are done and I will move on" but truly believe it..
Until you do that, you are going to be miserable..
I know it's the same thing you've heard, but girl, it's really the only thing that helps..