To add someone to your friend's list, go to their profile and click Add Friend. A friend request will be sent to them. After your friend receives and accepts your request, you can see their profile on your Friends page.
Visit your Friends page often to accept or decline friend requests. Every time someone sends you a friend request you will receive a message. To remove a friend, click x. When you remove a friend, that person is removed from your Friends page and you are removed from theirs.
Tip💡: If you would like to be added as a friend to a particular contributor just send him a message and ask him to do so.