First of all, I think you should NOT change Ts! Your T hasn't done anything ethically wrong - there is no reason to skip town.

What I do think you should do is examine your behaviors in addition to hers. Are you pushing her away? Are you being closed? Are you cross a boundary? Are you asking too much? etc What is happening in this situation may be reflective of patterns in your life.

Most importantly, you must, must, must talk to her about these things. Without talking, you will not fix the problem!

Good luck