Sadsis22, welcome to this board. I have found it to be a place to learn, vent and get advice. It’s true that a lot of people don’t understand borderlines (or recognize them). I am so sorry that you are feeling tired and hopeless. We have a shared experience here and can understand and relate to your feelings.
She talks to text and rants about everything then lays on the guilt and pity party…She refuses to see herself as a common denominator in failed or troubled relationships. I love and care for her and worked a long time on my boundaries but the game keeps changing. I’m so sad to see her struggle so much - it is so painful and impacting my life. I hate she puts so much anger on me.
Loving and caring about some wBPD is so hard. Witnessing the suffering, enduring the rants and anger, while setting boundaries when the issue continually changes. I can hear your deep caring for your sister and desire to help her. Like you, I love my sister and see/feel her pain. I am also no longer willing to be her punching bag however.
One of the things I learned here, is that my prior attempts to appease or help her, only inflamed things and just as we need space, she may also need space. We have to stop taking responsibility for soothing our pwBPD, and allow them to self soothe. Even with your parents gone, it’s not your job to calm her. Going low or no contact sometimes helps. When things got really bad, my husband and son blocked my sister’s number on my phone and screened my messages on my iPad. My therapist has encouraged me to briefly acknowledge positive or neutral texts, but to wait 24-48 hours to respond to toxic text or email rants with a BIFF response. I encourage you to read some of the communication content on this board. The truth is she is going to dysregulate. It’s often impossible to identify the trigger or prevent. In my case, my fathers death and my mothers medical problems have resulted in a new level of dysfunction and our relationship is close to destroyed.
I am glad you have a supportive spouse and friends. Lean on them for support, come here to learn and relate, and invest in your own self care. I have had a horrific week with my sister and am just trying to refocus on my own physical and emotional needs. Wishing you peace.