For the last several years OP has presumably bared her soul and had her own private matters subject to intense scrutiny and probing. Now in the midst of a nightmarish rupture the therapist is exempted from even a little bit of personal disclosure and honesty in service of the well-being of his client. This is stupidly ironic.

I faced a version of this. My therapist was consistently evasive, right up to the end, while expecting nothing but openness from me. Do as i say not as i do.

Let's recall that extreme withholding of information is a characteristic of abusive relationships.