>>9711547I had a BPD gf for 5 years, even lived together for 2 years. I knew her from highschool and knew she had issues but I was young and naive and thought I help her. This relationship left me with the best and worst experiences in my life.
People with BPD are completely unstable and it will emotionally drain you, and by the end you'll end up sad and broken.
However, if she's anything like my crazy ex-gf the sex might be worth it. Take that as you may.