Communication in Relationships

So today's problem was how to do with relationships. I'm in a relationship and its long distance, even if its long distance we tend to argue like any other couple may do. As teens we can be more pushing about certain things and not realize how it maybe affecting the other person. We tend to take more often then give back to our relationships ending in break ups, more fighting. I have been told we see things at a more of emotional point of view, which sometimes may help but other times make our feelings about one another more confusing. Sometimes I'm not sure how to stay calm when we are arguing, sometimes I want to say I'm done but know that's not the solution to a relationship. You have to learn you weaknesses and strengths and theirs too.  Begin able to maintain a healthy relationship is hard and in a long distant relationship you tent to run out of things to talk about, or thoughts to share with each other. So I was wondering if anybody had any ideas to help ease the tension that maybe created in a long distance relationship? Anything may help. 
Its hard to think that when your mad how easy it is to give up, but when that little argument is over, you feel stupid cause if  you did end it, that means you wouldn't have your best friend anymore. I know you give attention and expect it from your other half. You need to let that special person in your life know that they matter and that you care about them. You can't just stop saying these kinda thing, you have to keep up with it, so they don't forget and feel unappreciated. You have to keep communication open in any kind of relationship. Be able to express yourself.