Hi Kmadr3088,
No problem! It's okay to find your way around and figure this place out as you go!

I am so sorry for your shock and pain. I had a boyfriend who once told me he "would never ever break up with me, he loved me soo much" just days later break up with me for no reason and never really giving me a chance to speak with him or understand why. So, I can deeply relate to your shock and hurt.
She knows she has BPD? Has she been getting any treatment for it? Does she understand it very well? Did she give any reason for the break? Has she done this before?
I am no expert in these matters, but from what I've read here, if she has broken up with you, you could try calling in a few days to see how she is, but best not to put any pressure on her over the state of the relationship. I hope other senior members will correct if I am misspeaking here. I think you will find a lot of comparable experiences if you read through the site a bit and some good coaching on this topic.
Although I can't offer so much in this moment, my time is a bit limited, I did want to let you know that there are people here who can help... .it just sometimes takes a little time to connect with them.
Please keep posting and asking questions! Hopefully others will join us here soon!
take care, pearl.