Hi
Welcome to the board. You'll find so much support here. It's such a relief to have other people know what you are going through. It's hard not to take the things said to us personally, because well, they are personal and hurtful. What activities outside of your relationship do you engage in for yourself? How do you find your own personal validation?
We have a lot of great workshops on the right side of the page. These can really help improve your communication with your pwBPD, teach you new skills in navigating your relationship, and also help you work on taking care of yourself. To get you started here is one of our workshops on not being invalidating. A lot of the time us nons think we are just standing up for ourselves, but the way we do it sends a message to our pwBPD that we aren't listening to them.
https://bpdfamily.com/content/communication-skills-dont-be-invalidating