Sitting, I am sorry your t is not replying after replying before to your emails. Only she knows why and I think you should ask her. People say that ts don't play games but I can't help feel like they do sometimes, especially when they reel us in and then fire us out again.
They have so much power over us if we attach and backing off and not replying is playing a game with the vulnerable, like a cat and mouse. Boundaries are so important but it is up to t to set them and if she feels overwhelmed then she should tell you and not just ignore the email.