Becoming a resident to avoid college costs?

I am a junior in high school and i live in Michigan, and i am not fond of it here. I recently took a trip to chicago because my sister is going to college there. I was captivated by the city and would really like to go to a university there. I have already found some colleges that interest me, but they would be much more costly to attend than just going to a university in-state. I was wondering how hard, or easy it would be to just become a resident of the state of Illinois, or would it have to be my parents that became residents. I just don't want to have to pay thousands of dollars more to go to school in a different state and have to be in major debt when i am an adult, like my sister will be doing. Please help. Thanks.