Hi,
I wouldn't worry about it. Nobody looks at positive feedback. People will look at your feedback number and if you have negatives, but 99% of the positive comments are generic and repetitive. There are only so many nice things that you can say. People will search for the negative comments to see what thier problem was, but they will just scroll really fast - past all the green looking for the red. Your percentage is intact - I wouldn't even let the guy know that it bothered you - otherwise he knows that he got to you. Jut my opinion.
Peace,
Don