You have to change. You have to learn empathy compassion validation learn how to listen.
The more you practice this the more natural it becomes. It is important that it becomes part of your personality as a whole rather than just an approach towards your pwBPD. The reason why it needs to be a natural change in you is you need to subconsciously pick up on these sparks and not skip past them. eg
pwBPD:
" I cant fix this, i am just useless i cant do anything right"Typical
non response(meaning well): "
Thats nonsense of course you" can<<<<WRONG you have just told them they are wrong and skipped right over their feeling of hopelessness.
pwBPD : (They're not listening to me, so I'll force it)
"What do you know you haven't had to put up with XX"non (trying hard to reassure):
"nonsense that has nothing to do with it if you just apply yourself i am sure you can succeed"pwBPD (now getting worked up because their feeling is not getting heard, possibly shouting):
"Oh you think it so easy do you? What about when you did XYZ, that was all your fault, your the one who is useless, no wonder its so hard to get anything done around here all you ever think about is yourself you never listen to what i want"By this stage validation is going to be a lot harder to implement.However if your nature is to validate after the first comment it would have cut all this out. eg '
It does drive you nuts when you can't seem to get things to work, I can see its really getting to you, is there anything i can do to help"ie by getting in at the start they dont try to test your patience, you have answered their question before they asked it which is, "does this person care about me and understand how hard things are for me?"
Do you remember those math classes where you stared at a page of numbers and was completely clueless, didn't know where to start and was getting anxious you were falling behind the class, eventually you may have asked the teacher for help and they responded with 'just concentrate i am sure you can work it out if try hard enough and focus"... your response, inwardly seethed/panicked, felt like a loser and completely hated math class... That is an example of invalidation you heard "you are a loser who doesn't try hard enough"