I'm not exactly clear on this-- did he actually say that you should cut your hair? You wrote that he said that you would look better with a short haircut. Did he actually say "better?" Or did he say you would look "nice" with short hair? I ask because while I don't think there is anything wrong with a T commenting on your appearance in certain instances, I do think it is inappropriate for him to say that you would look "better" than you do now if you altered your appearance in some way.