I think you are moving to the right direction. Actually I know you are. And I am glad she is responding with the little positives you mentioned.
Please, please do not backslide. Dont engage in any convos, dont try to check if she misses you over the holidays... Keep your necessary and healing distance. You will see, as times passes, things become simplier (not easier, simplier).
Your goal is to keep your interactions indifferent, neutral... I was so glad to read you had some time with friends etc. Life does go on... xxx K
