My and my girlfriend, we are both sixteen, have been together for three years. I do really love her, and I do hope to marry her someday. We have talked about being married, and what it would be like, how many children we would want, what their names would be, where we would live, etc. We both agreed that we would like to be married around age 23 no earlier, because of school. A lot of people in my family think we will end up getting married, and they treat her like a daughter. Should I get her a promise ring? I know she would really like it, because I know her inside and out. What do you think.