Here's my story.
Close to 2 years ago a guy I have worked with for 5 years invited me over to what a thought was a 4th of July party. Turned out it was a birthday party for his daughter. Me an him were pretty good friends and we travelled a lot for work. He was like a father to me. After never even saying anything to me she gave me her number.

When I left she walked me out to my car and gave me a hug and told me to call her to hang out the next day

. I did.
She lived with her grandma

who was really nice. As things went on she talked about abuse and abusive boyfriends

and how her family was split because of her mom lying (who I also think has BPD)

. Things got weird at work and me and her dad didn't seem to have the same bond. I helped her as much as I possibly could. She didn't drive

, barely had a job

, had a lot of problems with people

and I was there for her. She moved an hour away with her grandparents which I thought was a great thing. She had a full time job lined up and it was a great way for her to save money. I was busy with work all week and stay at her place on the weekends or pick her up to stay with me. I couldn't afford to support me and her living together as a share a place with my friend.
Fast forward to 3 months ago she say she isn't getting anywhere living with them

and she ended up moving in with my friends. She split me black two months later while she found a replacement.

Moved in with him a month after that.

We have been nc for two weeks ever since I saw them together (she was lying about what she was doing the whole time

)
Well she texted me today and called me saying she is sorry for everything

an is ready to tell the truth. Said she talked to her dad about getting a doctor on his insurance and is ready to say she is sorry and explain herself to everyone. Said she broke up with my replacement

and has been living there still

and is moving out. Now I really don't know what to do. She did leave me but she said it was because she saw what she was doing to me

. She was also off her pills

. Help!
I'm sorry about your situation. It sucks, and most of us have been there. Personally, I'm one month and two days of NC after 4-5 recycles during an 18 mo r/s.
My guess, based on my own experiences and the others I've read about here:
- Her family started to distance themselves from you after she started the smear campaign against you. And/or they've witnessed their daughter go through so many guys they're numb to it now.
- She dropped you because she found a bigger better deal. A guy who could support her. Now that things didn't work out with the new guy (surprise, surprise), you're being recycled because she needs someone to validate her, which it sounds like you were great at. Not great for you of course, but why should that be her concern?
- Don't listen to her words, watch her actions. Talk is cheap, especially coming from a pwBPD. I'd be surprised if she actually made it to a doctor (what kind of doctor, a therapist?), and extremely surprised if she made it past the first few sessions. But if she is already supposed to be on pills, who prescribed them for her?
My advice? Run. Far away. Begin strict NC immediately. You can't fix or save her. Focus on healing and improving yourself. Ask yourself why you have codependent thoughts/behaviors. Begin the grieving process and move forward. Keep reading and posting here to gain insight and strength.
Again, I'm sorry for your dilemma. It's difficult, painful, confusing, and emotionally draining. But NC is really the only way out of this. Good luck!