Have a lot of the same conversations with my SO, reading Stop Walking on Eggshells really hit home for me, started recognizing the patterns you are mentioning. Was kind of like an ah ha moment for me in how to proceed with my current relationship.
-acknowledging to myself i cant move in with her like this (though inhave no idea how to bring that up)
Just understand where you are at, moving in at this point probably will increase difficulty until resolve some of the issues, it doesn't get easier with kids.
-not saying my needs really..
Keep it simple when you express, window and processing time for BPD is very short.
What do I do next? I have to function and i’m not.. i get chest pains and have trouble sleeping..
Take this to your T. Chest pains are from wounds to inner self, need some time to sit with those feelings, understand them without judgement. It's painful at first, but once work through and start accepting those feelings, will have a clearer mind in how to proceed. I guarantee you will feel like crap working through those feelings, but end result will be healthier in long run. See a couple other threads here on "Radical Acceptance".