My ex was a bit different... she wouldnt talk to me or a couldnt talk to her no matter what I did ( including beging and pleading ) she had no problem txting me 100s of times. It was so frustrating when she choose to argue threw txts and emails while living under the same roof. These txting sessions could and would last all day, all week if I kept responding. Try arguing with a BPD constantly threw txt.
Been there, done that. It's exhausting... .and circular... .and painful... .and also pointless... .The last time he started to argue via text I told him I was blocking him, and then did it. So he emailed me the next morning asking if he was still blocked. I told him I had unblocked him... .but he stopped bombarding me with ugly text messages by then. He still didn't speak to me for a week after that... .but he came around. When we later discussed it, he acted as if I had two heads based on my version of the facts. Obviously he had distorted the facts since his feelings had changed by then. So I dropped it and shrugged off the whole thing.
It takes 2 to argue. I wasn't even sure what triggered the argument so it was impossible to respond properly. Withdrawing from the argument left him to agonize in his own misery. Waiting him out is what works for me. May not work for everyone... .I just blocked him out of self-preservation. Reading and re-reading his hurtful words he probably won't mean after he calms down does neither of us any good.