Do I have a shot at Duke?

Im a freshman in a college prep. highschool and the highschool has a select 8th grade application where they take very few kids (I was one of them) i had an 8th grade gpa of about 3.6-3.7 and freshman year my gpa was 3.4 i take as many honors classes as i can and i play lacrosse (one of the best on the team)[not bragging just giving info] and duke is big on lacrosse im not too involved in school and i havnt taken act or sat yet but i plan to...my main question is if i keep going like this do i have a shot? and what else can i do to improve my chances? thanks