I'm new to Facebook. The majority of people I've friended have accepted, but a handful still say "request sent" after even a week. Does this likely mean they've hidden my requests?
When you receive a friend request from people you don't wish to be friends with, you can decline by simply selecting "Ignore." Doing so will remove the request from your Requests list. They will not be notified that their friend request was declined, but they will be able to send you another friend request in the future.
If you take no action on the request they've sent you, they will not be able send you another friend request. You will appear instead as a pending friend request when they view you in Search or elsewhere on the site until you either accept or ignore the request.