I know nothing about Facebook but I'm pretty good with Google ;-)
Quote (complete with original typos):
"Go to the page of the person who you request. You will see the friend request then scroll all the way to the bottom of the page & see on the left hand sife "Cancel Request" and click on that"
Thanks Bunechico - that would probaly work if I knew their name!! I accidentally touched the screen under the picture of the person (they run down the side of the FB page) where they post the people who you might know because they have mutual friends. Will have to see what happens I suppose.