Hello,
If you scroll to the bottom of your friends list which you will find under the 'Community' button along the top (below the Blue Forum Home line!). There you will find the name of the person who has made the request. Find the box to tick and then below that is a button to accept if you wish.
If you still have trouble with that send me a friend request and I will take a shot of the area so that you can follow the above more clearly!!