One of my close friends was obsessed with her, making her a daily fixture in my life, beyond being one of my professors.  She was beautiful, and I hoped that she would return his affections.  I admired her because she clearly cared very deeply about her students and taught with a passion.  I think that my friend admired this aspect of her even more than he admired her physical beauty.  As empathetic and as insightful as she was, I think she never picked up on my friend’s unrequited love because he kept it so well hidden from everyone but me.