Ady - there is a very good saying....
If you love something, set it free. If it comes back to you then it is yours! - if not then it never was.
I think its time you sat back and did nothing - this is very hard i know. But if she truly wants you then she will do everything she can. Some of the girls on here go to extreme lengths to chat with their Bf`s.
But i really do feel for you mate - we have been in very similar situations - i am now single again but it hurt like hell to let her go (Tom! dont even mention him/her!)