Absolutely not! Your meeting ratings are completely private. You are the only one that knows the details of your meeting ratings.

We display reports based on whether a meeting sucked or rocked. You can see the statistics of all the meetings you have rated, all the meetings that your organization has rated, and all the meetings of all organizations using This Meeting Sucks! 

Your boss cannot see your personal ratings, they can only see the ratings of your organization as a whole.