Worried about my cousin

I am very worried for my cousin. Let's call her Katie. She is the duaghter of my mothers twin brother, my first cousin. I care about her alot and am also worried. She is very beautiful and thin. I was told that one time, for about a week, she became belimic. I know that sounds starnge, but she stopped because she was scared, I was glad. Bulimia is very scary. She is only 14 and has a crooked spine. She used to be great at guymnastics and she was at a provincial level, but she had to drop out for medical reasons. She is still very fit and flexible, though. I sometimes wonder how she stays that way. All her friends, including me(yes, I would say we're friends) are really worried, she's always getting sick and is showing one sign of anorexia. NOT EATING!! I want to check her hands out for scars badly now! I am really worried and she's usually open about anything, but latley she is very quiet about her medical condition. I'm scared there's something worng that she's not telling me about...