If you are not able to see your friends' closets, please try the following steps:
  1. Go to your Facebook Settings (Settings > Account Settings).
  2. Search for 'Apps & Websites'.  
  3. Locate Covet Fashion and tap Remove App.  
  4. Log out of Covet Fashion in the Covet Fashion Menu.
  5. Force close the game.
  6. Log back into Covet Fashion using your linked Facebook (not email!).

When you log back into Covet Fashion using your Facebook account, you will be asked to allow Covet Fashion to access your basic Profile information and your Friend list.

Be sure that you allow Covet Fashion to use your Facebook friend list in order to be able to see and borrow from your friends.