It might help if you give us more information, such as what university are you at and what university would you rather be attending.
However, on the most part the difference between the many very good universities and the few “elite” universities is grossly exaggerated. Also, it is relatively common for students to do very well as “pretty good” universities and then go on to graduate school at the most elite universities.
Guessing a bit due to lack of information, your best chance to ever attend an “elite” university is probably to do very well where you are now, and then go on to graduate school at a highly ranked school.
We might be able to give more accurate information if you can tell us where you are, and what your SAT and unweighted high school GPA were.