If my T uses my name in text, I know that generally, he is not happy with me (The last two times he used my name in text he said "XX we've talked about this already"). He always uses it in email; he starts with "Hi XX". Rarely in person. He doesn't even call my name when he does attendance in class. I'll always say when he's done "XX is here too" and he says "I don't call it because I know you".