I was just recently diagnosed with BPD. But. In the past I was married to a woman with BPD. It was a roller coaster ride from hell. She was the dominant personality, was abusive, we would idealize each other, then hate each other the next minute. We also had a lot of fun. We never addressed the core issues...and it ended very badly. If you are going to make it work, make sure you both have solid communication/ assertiveness skills, supports outsude the relationship, and good therapists.
Good luck!