How to get over my fear of eating in front of people?

I have a fear of eating in front of people in school and in front of even my best friends. Recently, my Jrotc instructor had talked to me about the fact I wasn't eating in school and said that it was all in the mind. And now we have a banquet coming up with all of the cadets... So Im trying to get over the fear of eating in front of people before then, So I can actually enjoy the banquet. Any ideas on how to get over this ridiculous fear? ):