There's always the phone, e-mails, skype, AIM, g-chat, etc.

There are so many ways to staying in touch with people nowadays.

Back in the olden days, they used to write letters and wait days to hear back.

If you can't handle the distance, then I say you two sit down and have a chat.

Call her, Text Her, email her, Skype her, snail mail her.. . And see her when you can see her.

Have a lot of things to do to keep you busy until you can see her.