Your school might have a cross-town agreement with another college's ROTC program. If not, investigate OTS (which is after graduation).
If you do not get a pilot slot, you would have to choose something else and fulfill your commitment in another job. It's always good to have a back-up choice.
AFROTC is a commissioning program, NOT an enlistment program. They are two completely different routes. I suggest you do a little more research into the difference between officers and enlisted.