I'm still in high school but I've decided that I want to pediatric nurse pactitioner. However I don't know how to go about becoming this. Do I have to go to college, then nursing school and then.. Also, how many years in total will it take to become pediatric nurse practitioner?

Yes, you will be going to college - you can often get your nursing degree at the same college you do your general requirements. To become an RN with a Bachelor's Degree - at least four years of college. Allow at least one more year, possibly two, to obtain a Master's Degree in Nursing. Your state's Board of Nursing will have the information on the Nurse Practive Act, which states the rules and regulations your state's RNs and NPs have to follow.

See the links below.
Nurse practitioner - Wikipedia, the free encyclopedia

National Association of Pediatric Nurse Practionioners
NAPNAP

From this sire: Pediatric Nurse Practitioner Job Profile

A pediatric nurse practitioner is a registered nurse and nurse practitioner with advanced training in pediatrics and can provide nursing care to infants, children and adolescents. The pediatric nurses perform physical exams, diagnose injuries and many common illnesses and have the training to provide the treatment procedures, therapies and medication necessary for the child. They order specific lab tests and diagnostic testing, such as x-rays, blood tests and laboratory tests when needed. Trained to give immunizations, they also manage their patient's problems, such as juvenile diabetes and other conditions.

Pediatric Nurse Practionioner Programs by State:
Pediatric Nurse Practitioner Programs from All Nursing Schools

A very good resource for you in high school is your school's guidance counselor. That person should have all the necessary information on programs and colleges, as well as financial assistance available.