Purdue's campus is situated in the small city of West Lafayette, near the western bank of the Wabash River, across which sits the larger city of Lafayette. State Street, which is concurrent with State Road 26, divides the northern and southern portions of campus.
People who have sent you friend requests are visible by clicking the friend request icon in the menu bar. Friend requests you have sent are visible in your Activity Log, using filter Friends: (you may have to click more to see it).
But to see the requests that you've sent - and that have been ignored - hit the View All text underneath the list of pending requests. This will take you to a new page on Facebook with the same list of your pending requests and suggested friends. But at the top there will now be a View Sent Requests option.