My personal opinion is if you are under 19, then you really shouldnt even worry about a girlfriend right now. If you so insist though, I suggest you think wisely before you make any attempts at dating a friend. Considering she may treat you "special" she may not actually have true feelings for you. I many a time have made mistakes because I thought a girl liked me becasue of how she acted around me. Trust me, you should just be friends. Besides like most relationships it will end up with a break up. Then you realize that you lost a really good friend as well. (Happened to me as well). Your better of with friends anyways.