I'm sorry to hear it! I would be sad too. Many years ago one of my best friends (I only have two really good friends and I still live in the same area I grew up in.. sad I know) left for medical school. We tried to talk some on the phone and email, but it just wasn't the same.
Now we don't even feel like friends at all. I will admit that neither one of us put much effort into a long distance friendship and so we ended up with nothing in common. She made new friends and now is getting married. I wasn't asked to be a bridesmaid and a few years ago it would have been different.
So make sure you guys keep in touch! Don't lose a good friend just because she moves
