@Julie0635 , let’s say by some miracle you DO get into Princeton. You won’t, but let’s say you do. There is a great reason why these colleges have average test scores and grades that are very high. High grades show that a student has the work ethic required AND the intellectual capability to succeed at the school. High test scores show much the same thing, but they also show that a student can perform well in a certain amount of time in stressful circumstances.
The reason why the averages at Princeton are not in the range of your test scores and grades is really simple. Students like you will have an extremely difficult time coping with the expectations and requirements of a college like Princeton. The few students with your range of scores and grades are almost certainly recruited athletes. They probably recieve intensive extra private tutroing services and the like. Also, it is unlikely that those students will have both subpar grades AND test scores. It is most likely they have one or the other.
Your school counselor needs to be fired for encouraging you to apply to those schools. Maybe you qualify for app fee waivers, but you will not get in and it is simply unethical for your counselor to suggest you have any chance. Shame on him or her.