Hi Stacma04,
Trying to understand this behavior can be an enigma. It is reasonable to ask questions.
I am so sorry that you are going through this. I can understand how hurtful and callous for someone to break up with someone via text. Emotionally mature people do not break up via text. People who do this, often use avoidance as a way of solving problems. Many times avoidance comes from shame and guilt.
I feel like they push away the people that love them the most. Its such a messed up situation for everyone involved.
This is commonly the case with pwBPD. It is a vicious cycle. They find someone they love, but their own shame/guilt, impulsivity, dysregulated emotions, abandonment fears, fears of engulfment, poor self-esteem, and self-sabotage almost set them up to be a self-fulfilling prophecy. It really is a messed up situation for everyone involved.