Been there too. What finally allowed me to move on was the realization that mulling day in and day out on no longer being with that person and how things could be now or in the future with that person, prevented me from really loving and appreciating that person even now and loving and appreciating that relationship in my life. Instead of brooding over the negative (that person is no longer here; my life could be better if that person was here), I started to appreciate the person and my past relationship with her as a gift in my life. The time spent with her was a perfect time. Mulling over the fact that the relationship was over, I lose the gift, the happiness, the appreciation of ever having that relationship. Allow yourself to love that person now because real love never fades away – and be happy you have that love. Love the time you had with that person and understand and appreciate that time because it was a gift that will stay with you forever. Looking at it all this way allows you to be happy about the relationship. Looking at it the way I believe you are looking at it now takes away all the good thing that came from that person and relationship……..a good illustration of what I am trying to say is conveyed in the movie 5 to 7……check it out.