<< Just say: "Please don't walk by here anymore--you're really attractive and I have to study, even though I don't want to". >>
I wonder if that line really works...I've often thought of using it in the library and the gym ("Excuse me, I'm sorry to bother you but could you move a little to the left? When you're in me field of vision, I find it hard to concentrate on these big weights and I don't wanna hurt myself now."