Remove post preview when publicizing?

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  areffd · Member · Jan 1, 2015 at 2:14 pm

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  I see the option to add a message before the link to my post. But when the blog posts to Facebook and Google+, it shows not only the message but the first 100 or so words of the post itself. Is there any way to remove that preview? It makes the message get a little lost in a wall of text.

  The blog I need help with is: (visible only to logged in users)