I think that your letter is good but like Petra5d think you might want to make the language more direct- "I needed to see you express emotion like a human being and you outright refused" or something along those lines. I honestly believe that Mme T doesn't understand why you are so hurt. Given she is a T I find that concerning, especially since you've made it pretty clear I think. If she knew what she was doing she'd take a different approach anyway, since understanding the expressing of emotions is something you are working on. I'm glad you have this new T because she is way off in terms of understanding you and your needs. True as a female smiling shouldn't be part of the job description, but making a conscious decision not to isn't either. As a side note, I have never, nor have my children, had a teacher who does not smile (unless they are disciplining of course). So unless you're in the throes of a serious conversation, an argument or other scenario when a smile may not be appropriate, I think it is very bizarre.