Maybe you should email her a goodbye letter. I did this for myself once and the healing took awhile but I was able to move forward.
Our relationship was kind of broken from the start, she had a boyfriend and was dating me at the same time, she would break up with him and then get back together, we would be friends then more than friends the next moment, this went on for a couple of years as we lived together. She had finally made her decision and I wasn't a part of her world in that way anymore, but I could not get her out of my mind. As she distanced herself I continued to show more emotion as I talked to her, then one day she was gone, I wrote a couple more letters to her and she didn't respond so I finally wrote a goodbye letter to her, the notion of 'goodbye' was something we both shared and talked about as meaning 'moving on and not looking back'. This was my one way to shut myself out of a pair of lives that could no longer be.
I guess I felt that there was too much pain in the way I was chasing the moments we had together, trying to save it and have her acknowledge it, I had to move on like she was. There was more pain, and some depression I went through, it felt as if I had put all my eggs in one basket and even though she broke the eggs, I still loved her, things were now without her and so there was nothing, just starting over somewhere, something else. And so I did start over.