Portraits- Research

Well i have given my next project brief, which is studio portraits which i do like the sound off as i enjoy photographing people as i like to bring out there personalitys. But my problem started when we were told that we will be taking photos of each other in our group, now i am very unphotogenic and personally am worried im gonna wreck someones project. So i am feeling very apprehensive and would just rather take the photos than be in them. But with that said i have heard that, that is how you know your a photographer because you would rather take the photo than to be in it. So just before i start the project i want to appolaguise  to the poor person in my group that is going to get me as a model for them.......but i will try not to brake the camera lol