Life's too short, not you!
This might seem like the most rubbish advice, but learn to love your height. I am pretty lanky (think olive oyl) and would love to be petite. Girls look best when they aren't towering giants (Kylie Minogue is 4ft 11, Rachel Bilson from the OC is 5ft 2, Buffy is 5ft 3). The best you can do is stand up straight with a killer posture and if anyone says anything, tell 'em to get stuffed. :p
PrettynPetite1 - I also got the same message...
Absolutely right, if you are not comfortable with yourself, or if you get told to 'change' for someone, then you should not even think of starting a relationship that will fail from the beginning. You should concentrate on education, and self-respect and self-reliance before sharing yourself still having doubts. Also if you would have trusted and talked about this with your parents, they would have told you that you are still growing and not to try and rush things. Believe me, parents are supportive of their children if given a chance.