LDRs are really difficult, because no matter how much you want to express your feelings, it is always limited by the distance between you. I would say that the biggest thing to keep in mind, is that as things get frustrating, difficult, or argumentative between you, is that a large part of it is caused merely by the circumstances you are in by that distance. Try to keep in mind that frustration due to your circumstances is not frustration at or from each of you, even if sometimes it can come across that way. Also try to appreciate the fact that the two of you have gotten to know each other in a rare and unique way that not many people have. Without physical contact, your communication is based on talking to each other, and really getting to know each other without the ability to use distractions that cause false intimacy. It may feel bad not being able to take each other out on dates, do fun activities and all that stuff, but the fact that you have grown close and are on a relationship without all of those things, means, in my opinion, that emotionally and mentally, you are able to communicate and know each other on a much deeper level than an in-person relationship. And always remember that no matter how hard it gets missing someone, that knowing them and having them in your life with the ability to miss them so badly is better than not knowing them at all. The fact that you met over a long distance is a good thing, because you met. So when you're missing each other a lot, try to keep that on. mind and focus on how great it is that you have each other in your own unique way.