Hey there,
I have done a couple long term, long distance relationships. I know that kind of 'pull over to the side of the road and cry' emptiness that you feel for awhile while you get used to things.
While it's probably still too fresh for you to see any positives about this yet, there are a few. You learn to communicate, you develop your own "self", there are fun visits to be had, learn to appreciate each other even more, you can ultimately determine if he is it for you and no others.
It isn't any fun sometimes though, definately get friends involved in your life and use 'em as a "support group". I hope you do okay.