I am planning on gettin married to my man this year around december regardless of what anybody thinks?

im 17 i will be 18 this year my boyfiriend and i are planning to get married this year we are going to sign papers at the courthouse but we are goin to wait for the wedding.. i been with him 4 years and i lived with him 1 year.. we love each other but for some reason there are still some doubts..