I think you have decent ECs and decent scores and a very good GPA. I think you could try to get the ACT score up 1-2 points and maybe talk about your ECs more in depth. If you do, you have a good chance at Cornell. Chance me back?
http://talk.collegeconfidential.com/what-my-chances/1791315-chance-me-johns-hopkins-ed-cornell-ucla-ucsd-ucd-ucsb-uci-emory-st-louis-washington-duke.html#latest