Welcome Kagsy: I'm sorry to hear that you have a mother with BPD. Has she ever gotten any form of treatment for BPD?
How do you know when you're "doing enough"?
For some people with BPD, you won't ever be doing enough. What's going on with your mom right now? Is you father in the picture? Anyone other than you able to assist her?
This is a safe place to share. I look forward to hearing more about your situation and what you think some of your mom's needs are.