Hi in4thelonghaul,
Welcome

YOu've found a great place for support and communication. I think it's possible to have a normal relationship with someone with BPD but it takes a lot of hard work. It will be important to make sure that you learn to validate, show empathy, help her with her emotions and tasks that she is unable to do without enabling her, and most importantly, take care of your own emotional needs. Is there an area that you think needs more work than others within yourself to keep the relationship healthy?