Hi flowersol,
Welcome and hello

It can feel like a big relief to discover BPD and realize it fits your partner. And I know what you mean about being independent, self-reliant, intelligent, highly educated, and yet feeling like a fool. If it makes a difference, one of the best things you can do is to talk to yourself like you wish your H would. Be kind to yourself. No need to make this any harder on yourself than it already is
It takes a lot of strength to not be emotionally injured in a BPD relationship. So step 1 is to begin rebuilding a tiny bit of self-care.
That will make it easier to deal with the relationship skills we put into practice, the ones that can prevent things from getting worse, like validation.
Do you have a T for yourself?