Mary Wright,
Glad you are here!
Having a parent with BPD is very challenging and is very upsetting to deal with their behaviors. I am so sorry that your mom wasn't able to accept your gift graciously and see the love and caring behind the gift. I also have an uBPDmom, so I know how you feel. I often would experience the same reaction from my mom when I would give her gifts. They were never good enough, or exactly what she wanted. I learned to just let her tell me what she wanted, and if I could afford it, I would get it.
How do others maintain healthy boundaries under pressure?
Setting boundaries are very important for your own mental health. It took a lot of reinforcing of the boundaries I set with my mom before I could see the results of those boundaries. I am wondering if this is really an issue of setting boundaries with mom, or trying to deal with the emotional pain of mom's reaction to the gift. Is this a common reaction from mom, and if so, how have you dealt with it in the past?
Do you have a support group of caring people to help you manage these episodes? Have you considered seeing a therapist to help you with the emotional pain?
I would also suggest reading about Fear, Obligation, and Guilt (FOG) to help understand your feelings surrounding mom's reactions. I am including the link here:
https://bpdfamily.com/content/emotional-blackmail-fear-obligation-and-guilt-fogAgain, I am glad you found us. Looking forward to hearing more about your story. Take care.