• Download the plugin
  • unzip it
  • upload bp-extended-friendship-request folder to wp-content/plugins
  • Visit Dashboard->Plugin->Installed plugin and activate the BuddyPress Extended Friendship Request Plugin(Network activate it if you are on Multisite)
  • that's it. Visit your website and enjoy the awesomeness 🙂

Alternatively, use the WordPress plugin installer. Upload the plugin and activate it.