Hi Meuthen,
Thanks so much for your reply! I've definitely calmed down since my initial post. Yeah, comedy helps coping with a difficult situation

I already feel a little hopeful with some of your advice. I think you're right. I'm sharing far too much personal information with her. I'm generally very open with most of my friends, but I need to put her on an information diet. I think that shouldn't be too difficult because she has no issue talking about herself for 45+ minutes before asking me a question about my day

I think I'm not so clear with my boundaries. Sometimes I am very clear and tell her that I won't be responding and will block her phone number for 24 or 48 hours. Once I do that, she usually reaches out through email (she has about 5 email accounts where she'll reach out to me)--I usually start reacting at that point and give into her games. This is the point where I get really frustrated. I end up having to block these individual emails. Sometimes I get curious, though, and open my spam folder to see what/how often she's writing. I've considered changing my phone number. My old therapist recommended even getting another phone line and leaving my old phone number to be used with my mom. But I don't want to have to live like a drug dealer. With this most recent fight, I ignored her initial 40 texts, but then the next day I was responding a LOT. She'll say ridiculous things like, "I think you don't want to see me because you're starving yourself" and I'll take the bait...Or I get really frustrated and tell her to "leave me alone and stop texting me so much and you have BPD and need treatment". I'm sure that's a horrible thing to say to someone with BPD. I need to lay down my boundaries in a neutral way that doesn't cause her more pain, yeah?
Sometimes I find that blocking her makes her behavior more severe, so I thought i'd try not blocking her this week as an experiment. But I end up reading her messages and responding, which makes me feel exhausted by the end.
The sex worker point you make is a good one--what she was sharing with me didn't sound super clear, so I think some healthy skepticism is a good thing here. Probably some paranoia on her part.
Our biggest issue now is that she wants to spend time with me and I don't want to spend time with her as much anymore because I feel really depressed after our visits. She is always pitching vacation ideas to me and tries to get me to agree to spend 10-14 days with her. I usually agree with her when she pitches these vacation ideas because she doesn't take no for an answer. I think a part of me wants to spend time with her. But once the time comes to buy a flight, I start feeling extremely anxious and back out, which triggers the explosion. I live a few states away, so I can't just see her for lunch or a dinner, so it makes visiting really difficult. I wish we could avoid these explosions because I really do miss the good parts of her.
I share my struggles with my mom with a lot of my friends and routinely get let down by some of their reactions. I think I'll stop sharing it with people outside of therapy and this board. I do have a couple friends that I think are safe/empathetic enough to share with, but I think I'll cut down on sharing with other people. I'm finding myself talking in circles with no path to healing when I complain about her. I don't know what reaction I'm looking for from people.
She said she's contacting some family therapists tomorrow to do some mediation/family therapy. I hope they will see that she has BPD and recommend individual treatment, but I'm not holding my breath
Thanks so much! I appreciate the advice!