Hello and welcome

As a follow-up book, I recommend
Stop Caretaking the Borderline or Narcissist.
It sounds like you're unsure about the relationship. Have you considered postponing the wedding to give yourself a chance to listen to your feelings and to get a better feel for how the relationship will be in the long term?
Like you say, being in a relationship with a person with BPD can be push-pull. It's a special needs kind of relationship. You can read more about what's required from your side
here.
Do you have any specific questions or issues you wanted to ask about?