Push come to shove though, he’s not willing to put in the hard work. Which leaves me with a hard decision.
Are you getting any therapy or support yourself regarding this issue?
It is often helpful to talk things through with a trained professional. This way you can weigh the pros and cons of your decision. A trained therapist will ask the hard questions, you might not have thought to ask yourself. My therapist refused to treat me anymore if I went back to my ex. That was really the catalyst for me moving out.
I'm interpreting the "ubpdh" as Undiagnosed BPD Husband. Therefore, it sounds like you are married to your BPD. It's definitely easier not having any kids with the BPD. I have one with my BPD ex-girlfriend. Even though we were never married, it's a rocky road that is difficult to navigate in a co-parenting situation. So you're lucky there, at least, if you choose to end the relationship. You'll have the ability to go no-contact eventually. However, you can still expect a long drawn out legal proceeding with a BPD, either way. A friend of mine is completing a divorce with a BPD, and the attorney said that the divorce took much longer than it would have in most cases.
That it was on me to decide what I should do as far as stay or leave.
Yes, we all are responsible to make our own choice. I've read in other posts people say things like, this is the BPD's way of saying, "Let's see how difficult I can make your choices."
I definitely recommend working with a therapist to help you navigate your path forward.