Hi im 17 I want to dropout of high school in NJ but they changed it to 18 what can i do to get around this or go to school in another state then do it

Stay in school until you are 18 or graduate.  You will regret it if you do not.  If you are having trouble in school, talk to someone about alternative education, home schooling, vocational education something else so that you can learn a skill, or get your GED.  Good luck !