Force user login and Facebook Like button

I run a private blog at richardpowell.ie and use the force user login plugin so no matter what page or post a user visits if they are not logged in the wp-login will display and redirect the user to the page they requested after login.
However, the fb like button or share button once pressed will post to the users fb feed as Richard Powell | Login in , displaying the url my domain.ie/wp-login.php

I am trying to set it up what it will display the like as the page title and excerpt that it used to do before implementing the login force.

That way I gain more views but once the new viewer clicks, they too must register.

Is there a way around this? is, letting logged in users share the page as it would share usually with the page meta… that way it attracts new viewers but still enforces the signup..

I hope this is understandable and any help possible is appreciated.