If you have tons of Facebook friends, you may not notice when one of them falls off your friends list. It could be that he unfriended you; it could be that he deactivated his account, or he may have blocked you. While Facebook keeps you from discovering certain private details of the state of other users’ accounts, you can tell whether someone unfriended you, deactivated his account or blocked you. You can do this by checking to see if his account is visible to you and mutual friends. Writer Bio
