I think the general consensus would probably be best.
I think long distance relationships, especially long distance ones can only work if you know there is light at the tunnel as it were, such as one person moving to the other. It kinda gives something to aim for and so keeps the relationship solid.
I recently got out of a relationship and I loved her and still do.. And even though things were great I think that towards the end we both kinda secretly knew that she was unsure about things but I carried on trying to make things last and it did work for a while and things seemed great again but eventually she broke up with me (women can say one thing but mean something else) and I think it hurt more because I became more invested in it by letting it carry on. But on a positive note we are really good friends now and share a close bond..
It's probably best to have a good talk with her and see what she is thinking and where she stands on the situation. Does she feel the same as you? Does she think it work and last until there is an outcome? Has she found someone else that she likes?
If your feeling like this then you should get it sorted so that if everything is ok and it's just a false alarm then you can stop worrying but if things aren't ok and it's for the best that you split up then you can do it and not get hurt more in the long run.