Marrige

My boyfriend and i have been dating for almost 4 years. But we`ve taken a couple of breaks in between those years. He`s in the army and just got his assignment in the state of Washington, and for the past 4 months, he`s been in South Carolina. I live in Michigan. SO we don`t get to see eeach other much. We talk on the phone everyday, but it`s not the same. We`ve been talking about getting married, and our plan was to marry in 2006 or wait until i finish college(I`m 18 and he`s 20) but i can`t wait that long! It`s os hard to be away from him! We both know we want to marry each other, but we don`t want ot ruin things by getting married to soon. But because of the circumstances, we`re debating it. Our financial situaation isn`t a problem, so it can work. Ths other thing is my family. I don`t want ot just get up and leave them. Would i be selfish for gettingg married now? He leaves in about 4 weeks, so if we are going ot get married, it`s going to be really soon. Which neither of us mind, but is that unfair to our families?
We`re both strong Christians, and we just want ot please God and do what He wants for us. Any advice would be great! Thanks!