Im also in position to give you some advices. I also been away for a whole year (9 months to be exact) and I left my girl away from me. The first days, or the first weeks are really difficult. Change your mind. Tell yourself that you're living your hardest moments and things will just go better. I have seen her during that time, do it if you can afford it. Dont start to drink man, Im serious
In my personnal experience, my relationship got improved during the year, we didnt break up, keep contact with her every day, twice a day if you can (internet is cool for that). I remember I had some difficulties to speak with her to the telephone in the first days, it's normal because you love her so much. I bought a phone card for long distance (just cheaper). D3v4S7A710N is right about meeting new people, you have to make new friends, they will change your mind.
Finally, I have a lot of friends in the canadian forces. They have to be away for long periods and sometimes more than a single time in a lifetime. They are not stronger inside, they control their pain and their emotions. It depends of your age, if you have kids its may be difficult.
good luck and email me if you need to talk.