This is an excellent example of you circling around picking on yourself.

When T told you she thought she was rude, calling you a couch potato and apologized, you then could have told her that, no, you enjoyed it, felt it as a light-hearted tease, showing she knew what it was like for you at home.

Without that interaction with each other, you are stuck in your head thinking about what you think she is thinking, and you can't know that, and worried about things that you don't need to be because you don't have any real information about them, just your own made-up negative thoughts that you keep picking on, staying negative.