Been reading the forum for a while but never posted before, but when I read what you wrote I had to register and post.
I was in a relation for 4 years, but at the end I was in the same situation as you now find yourself.. And it did not end well.
Im not saying it might not be different in your situation but I doubt it, really I do.
As Bill said earlier, chances are she is blowing you off because she is allready interested in someone else, like in my case.
And I was just like you, I never thought about it happening, not in a million years but after a while I finally grew a pair and demanded the truth.. Lo and behold, she had found someone else.
Unfortunately this situation was so similar I just had to post.. Even if it meant registering and posting with my phone.