well, theres only one way to make that relation working: one of you two must move with the other...
i had that kind of relation and it didnt work... obviously, if you have the money to go back and forth as MiSsBeHeaDReSs says, it might work for a time but in the end you get too tired... and on the other hand you are always missing those lovely daily routines like the everyday feeling of waking up with somebody on the other bed side...
one advice: it can only work if you plan a solution in the nearest future... let's say that you plan to move with her in a year time... then it might work cos you fight for a specific goal... and then you have time to get a job there and prepare your mind for it... or maybe its easier for her to move with you!
bear in mind that distance will make you feel so tired that it will destroy the relation for sure!
