How to Unfriend Someone on Your Facebook
Occasionally, you'll want to unfriend someone on your Facebook account. Perhaps he was an acquaintance at a previous job or a high school classmate you don't really remember. You may even need to unfriend a former spouse or significant other. Whatever the reason, Facebook makes it easy to do. The friend is not notified that he has fallen out of favor, although he may notice you are no longer friends. Just in case, better have a good excuse ready.
Log in to your Facebook account on your computer.
Click your name in the top right corner of any Facebook page to go to your profile.
Click "Friends" in the left column under your profile picture to open a complete list of your friends.
Locate the person you wish to unfriend in the list of friends. Click the button to the right of the friend's name. Select "Unfriend" at the bottom of the drop-down menu that appears.