Yes, what you need to want to be is be healthy and strong. People have different body types and just because someone is skinny does not mean they are healthy are better than anyone else. Aspire to be healthy, eat good healthy food and exercise. Now, many nuritionists and sports trainers do believe that BMI and Height and Weight is invalid. Do not hurt you body for anything. I am skinny but I have alot of body fat and I find it hard to get toned and its not pleasant as people including doctors always question my build.
Eating lots of fresh fruit and vegetables and eating well is better. You would be doing your body damage and lasting damage at that. And staving yourself makes you weak and it makes your hair fall out. Also, anorexia is not only a phsyical thing but more of a pyschological illness where they see that they are fat when they are not. Why want a pychological illness that damages your health? Eat healthy food, exercise - Aspire to be healthy and active.