The initial feeling I get from this is that this girl may be as slippery as a bar of wet soap. =) I also have a strong feeling you aren't being quite straight with us here in your story, for if at least ONE of you is not a "celebrity" or "well known", why on earth would you get TV, Magazine and Newspaper coverage??? That never happens to ordinary folks, at least that has never been my experience. The various media do not cover things that are not of real interest to a large audience. They are selling their wares based on their coverage of things that are newsworthy, which would include well known people or events in the lives of the famous or infamous, as the case may be.
As for the "romance", it is quite possible that this girl didn't feel the same way about you as you were feeling about her. She may have just discovered that maybe she was not really "in the relationship" to begin with... based on feelings that she has discovered both about herself and about you. If the chemistry isn't clicking for her, she may be looking for a way out, and she chose the blog as a reason, and that would be understandable, if the blog gets the visits that you say it does. You say she betrayed your trust.... is it possible that you betrayed her trust, too, by blogging things about your relationship with her? I would be put off by any fellow who did that to me. Things that happen in a relationship need to be kept basically private, and no one likes having details of their lives written and published by someone they thought they could trust.
I get a feeling that she is the celebrity here, and she was concerned about her career in whatever she does. Was part of your attraction for her based on that celebrity status? I sense that you are both young adults, and relationships are often not as stable when you are younger. Maturity brings something new to the table, which is a better understanding of yourself, and just what it is that you really want out of life. Tear away the "celebrity" part of the relationship, and ask yourself if that was a main trigger for the "relationship" in the beginning. If one of you wasn't a "celebrity", I don't think this would have happened in the first place... am I right?
It's okay if there is a celebrity involved here, and I would never reveal who you or the lady are, etc, even if I knew. I would rather not know. But, IF you were the celebrity here, I don't think you would see the girl running so fast in the other direction. Most girls LOVE that kind of attention from someone who is well known, and who probably would have a fan base of many other young ladies waiting in line to replace her. This is why I think she is the celebrity here, and you became enamored with her because of who she is to the world around her, and not so much your attraction to her true personality.
Love is like a butterfly. If you love it, set it free. If it returns to you, it is yours. If it doesn't return, it never was.
It's probably a good time to simply tell her that you are available to discuss this relationship whenever she is, and let her initiate the discussion when she is ready. If you don't hear from her, then it just wasn't meant to be. It is a sad thing to have to take this route, but it is the only way to test her true feelings about you.
I am not a reader, per se, or at least I don't call myself one. But, I do have a fairly strong psychic sense about people, and so I am just sharing my thoughts here.
Good luck to you in whatever you do,
Mare