I need help..

Let me start off by telling you a little about my boyfriend and I, we met in Nova Scotia when I moved there for school, I saw him about 3 times a week for almost a year and then I moved home and we had a long distance relationship for about three months while I lived in Ontario. He eventually moved to Ontario with his parents but about 2 hours away. Now almost three years later we are still together dealing with along distance relationship... and it’s starting to kill me. I so in love with this man but the fact that I can only see him max 2 times a month is emotionally draining. Even worse is that he is busy, and usually doesn’t put me as his first priority. He can see his friends anytime he wants, but chooses to hang out with them when I am available. He is also very family oriented and gives EVERYTHING he has to his family, including his time. But I truly love him and how close we are, and how great we are when we are together but I am going downhill emotionally. Is it selfish of me to want more of him? What should I do? How can I get him to understand?