R..
I was 5'10" by the eighth grade...and everyone always commented on my height...walking next to my 5'5" mom made me seem even taller...
People would ask her in my hearing if I played basketball...and it would make me cry because I felt like a super tall freak and I was so uncoordinated that basketball wasn't even an option.
I struggled through high school with dates being shorter than me (what is it about short guys that love tall women???)...I felt I couldn't wear heels...
But you know what by college I was glad I was tall...I could wear amazing clothes, I could gain ten pounds and no one noticed, and finally the boys were tall too. oh, and I realized that I was actually too short to be a runway model...so that showed me how many beautiful girls were even taller than I was...
My husband is 6'4" and he makes me feel so small...he can even pick me up. So, tell her there is a light at the end of the tunnel. And give her a great big hug from another 5'10" girl!!