I read your post because I saw that no one had responded yet, and once I read it I understood why. It seems that you are not really looking for advice - you are looking for someone to tell you what you want to hear, no one is stepping up to the plate to do that. . .
It seems to me like there is reason that you are being told over and over again that it is time to "get over it" and to "move on" because that is what it is time to do. (OK before you get pissed read this all the way through. . .)
Look at this from a different perspective - you love this girl and don't want to be without her, can you IMAGINE telling her that you heard she was hitting on other guys - good for her? Can you FATHOM telling her she looks great which shows that clearly being apart is better for you both? Without really knowing you I know that the answer is no - you want her to be with you not hitting on other guys and you want to believe her world is a better place when you are in it - she is sending you a very clear message, my friend - she is over you.
You can love her all you want - you can chase her all you want, but you can never love her enough for both of you and she can always elude you because she does not wish to be caught. You can follow your heart down this road further and wait until it is shattered.
Time and space are your only hope. With the passage of time she MIGHT decided she wants you back, but there are no guarantees and she is not saying anything to give you false hope. I say space becuase perhaps if you make yourself unavailable to her she might have the opportunity to remember what she is missing out on.
Best of luck
Jules
I think the mistake a lot of us make is thinking the state-appointed shrink is our friend. - Jack Handy