I'm sorry you're feeling a bit torn after having that exchange with your husband,
Elpis. I love your T's advice to you, and it sounds like you are in a very healthy place with your truth.
He actually understood that--he still made excuses "i'm frustrated and of course that will show." Basically "i can't help being rude to you."
Oh my, that's a familiar one.
I was able to explain that I am in a place of trying to heal both from my childhood trauma and from his stirring in that childhood trauma throughout our marriage. He actually took responsibility for doing that, so at least now he will recognize it rather than dismissing it, that's a first.
I'm glad you were able to express to him exactly where you are. It's good, too, that he isn't being dismissive. I know that feels so invalidating.
Later my brain said "it still comes down to him wanting you to rescue him." So it's not even healthy for him to have me in his life.
This is a point too often overlooked. A toxic relationship is toxic for
both parties. Once a pwBPD's primal fears of abandonment/engulfment have been triggered, they are no longer in a healthy emotional place.
I understand the terrible codependency we had, and it took me quite some time to recognize that I can't let other people take care of me, I need to learn to take care of myself.

You have done a lot of good, hard work on yourself.
It's frightening to realize the depths of these enmeshments... .and humbling to realize the role we played. The good news is that this knowledge is the basis for truly healing ourselves.
My T always says, "What is the truth?" and tells me to ask myself that question when I get confused. And the truth is that in the state we are we would injure each other more.
It takes a lot of strength, empathy, and self-awareness to realize this.
And that there are still so many things about how he treats me that make me less than a whole person to him, and I can't allow that.
No, you can't. You deserve better than that.
I understand how you feel with the objectification. I think it's easy to misunderstand the term "objectification" when dealing with pwBPD -- it's not so much a conscious, manipulative viewpoint as it is an understandable cognitive result of the disorder. pwBPD have an intense need to be loved
by someone (object performing action on them), while simultaneously fearing that
the someone will hurt or leave them (object performing action on them). The partner in the relationship is not evaluated based on themselves so much as on
the way they make the pwBPD feel.
Living with this, especially for a period of years, can certainly leave a person feeling "less than a whole person" to the pwBPD.
I think you're definitely on the right track for yourself and your wellbeing.