Do I have a good chance at getting into Northwestern University?

I am a junior in highschool in the suburbs of Chicago. My highest act score is 30, and I have a 3.92 gpa. I have taken 4 ap cles so far and next year I will take 4 more. I have been in all honors besides AP my entire 3 years so far, and I work really hard. I was accepted into the pre law summer program at northwestern, although I want to apply to the School of social policy and education. I took a visit to northwestern and have done community service at a homeless shelter in Evanston where they donated lockers we got to paint! It is my dream school. I have done club volleyball for the past 4 years, beach volleyball in the summer the past 3 years, school volleyball the past 3 years, and work for my club as a coach for little kids the past 2 years. I am very close with my counselor and I know he will write me a good recommendation. Next year I plan on entering my schools national honor society. My gpa will also increase after my semester ends june 11th. My grandfather also went to northwestern if that makes a difference. I am going to get my act up as much as I can! What do you think?