First of, all, congratulations on what you have done so far. A GPA 0f 3.6 is excellent. However, I am sorry, but 3.9 GPA by graduation is not technically possible for you. You have finished half of your credits by now, and, even if you got solid As on every course you will take until graduation, you cannot raise your GPA to much beyond 3.8 range. A GPA of 3.8 by the time you finish your first semester of Senior year, when you are applying RD for colleges, will be almost impossible.
You should modify your list of colleges and programs based on a having a GPA of 3.6-3.7. If you get all As in your junior year, you can reconsider a list with a GPA of 3.73-3.75.
The mid 50% range of GPA for UIUC Gies is 3.60-3.95. Since their acceptance rate is about 60%, and that of Gies is somewhat lower, that would put UIUC as a target, not a safety.
U South Carolina has similar acceptance rates, and your GPA is in the middle of their mid 50%, making it a target as well.
You will not likely meet the criteria for direct admissions to Kelley. You are within the mid 50% of regular admits to Indiana, and their acceptance rates are about 76%, making it a low target (or a likely), but not a safety.
That is assuming that you can afford OOS tuition at these colleges.