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).
Open the Friend Requests Sent page by clicking the Friends icon, selecting Find Friends from the drop-down menu and then clicking View Sent Requests. Locate the person whose friend request you want to cancel and then hover your cursor over his Friend Request Sent button. Image courtesy of Facebook.