I don't see this as a situation where your T was unwilling to disclose "a random thing." He disclosed the answer to the precise question you asked but did not volunteer additional information that was not asked. In the T world and in other kinds of communication, it is considered healthy and respectful to not put information on someone that they don't need or want to know. Your interpretation of this is he is holding some kind of invisible and unarticulated boundary, so you chose not to ask any additional questions. And you go further and over-interpret that as something about you and what he was thinking.

It seems like a situation where you blamed him for not giving you what you wanted to know, when you were too afraid to ask. Sometimes what people give back to you is a function of you and how you communicate, not about them or their weird thoughts about you. I'd encourage you to check your perception out with him and see if it really was a situation where he would not have answered the question, if you'd posed it.