There's the emotional piece of it, where you feel what you feel. There's the cognitive piece, where it might be that you have some space to maneuver between the emotional and trying to see it a different way, and then there's the behavioral piece, which is what you want to do about it. I'm not clear from your post with respect to what kind of therapy is being offered to you in terms of how often, etc. I do recall from previous postings that this T offers you greatly reduced rates and perhaps you don't feel you have options to switch.

I think others have offered in this thread that there are different ways to interpret it. In my world and what I know of academia, collaborations do suddenly come together based on grant funding and personal relationships etc. And that people say things that are true in a place and a time but do not necessarily apply when life inevitably throws a monkey wrench in things. For me it was important once upon a time to let people off the hook and be less hard on them, hold their feet to the fire less often and with less intensity. For you this may be a chance to think about whether you might be occasionally a teensy bit too hard on other people, and that tends to drive them away. From what I see, your T has a right to arrange her working and personal life as she sees fit, for whatever reasons she chooses, and her patients/clients have to find a way to deal with it. Certainly I would hope she offers openness in being willing to discuss it as part of your therapy, but it is your therapy, and this should ultimately be funneled towards you and understanding whether you might benefit from some work in examining your own reactions to people disappointing you or letting you down.