Hi Husband2014 and welcome back

Thanks for sharing your update with us; it's meaningful to the group to see what progress and change can look like.
To me, your story speaks to how change happens not through making the pwBPD think differently, but through you (the non-BPD) taking responsibility for your own choices and you deciding to work on yourself and your responses. While there are no guarantees that the pwBPD will change at all, it can and does happen that they change in response to you taking the lead and setting the tone.
Although you two still have a long road ahead, it's wonderful to hear that your relationship is much more peaceful than it was. I hope the two of you are able to rebuild from here, sharing some new neutral-to-positive experiences together.
It is hard - and it can be done

Can you remind me if you have a therapist or counselor in all this?