I would honestly kill to have your body, hun.
Think of it this way, everyone is unique. Everyone is built in different ways. You'll get curves soon. I really don't think that they are that great. :/ I wish I didn't have them. Be thankful you are the size that you are. And, the height thing.. I've heard more guys say that they think shorter girls are cuter than taller girls. So, don't listen to that jerk. He just wanted a laugh. Obviously, you or noone else is laughing. You are very pretty, a nice height, and have a body that most girls would love to have. Be thankful.
Cause, when those curves come.. you may wish to be the size you are, again. lol