Fyi:
males continue to gain height well in to their 20s; whereas females tend to begin to mature quicker, they stop sooner as well.
Height is primarily genetics, but not limited to just your parents. If you have taller grandparents for example, you could get some of those genes.
My brother is 2 years older than I am and when he was 16, we were about the same height (i am a female), about 5 ft. 2 in. By the time he was almost 18, he was just at 6 ft. He now stands about 6 ft. 1 in., and i'm still 5 ft. 2 in.
I can understand you being concerned, but as you get older, it won't seem like such a big deal either way, tall or not so tall.
Libby