I think that one of the most essential parts of being in a healthy relationships is open communication. As long as you have access to a phone or internet, where you could chat or talk on skype, you should be ok. One of the things that I have found is missing when you are long distance is sharing the events of your day so you can really be a part of one another's lives. If you have time to chat with one another and make it a daily routine of sharing even the most mundane details, I think it helps to lessen the distance.