Can you relaspe in BPD after the full treatment of DBT?
I did the 2 years of DBT, I'm still seeing my individualist therapist. We currently working on my anxiety/OCD. But I notice my BPD has gotten worse since well my therapist told me we only have 8 more months together. I go to the public health system as my therapist explains they can only keep clients in due to a certain time frame. I live in New Zealand so the goverment supports and gives money to publix meanlt health unlike sadly in America.

Anyway, I had a massive I guess a melt down at home. It was towards my mother. She is very dismissive and emotionally distance. I have try to do DBT skills like the Dear Man to her when I feel upset the things she says to me. But she doesnt respond to the dear man at all. I could do the best dear man even right it in a letter which I have and it doesnt work. I even went through the letter to my therapist before giving it to her. Even my sister doesn't respond to the dear man she just ignores it or be more dismissive. Its quiet of a phenomenon. Because if I do the dear man to my partner or friends it works fine. So I'm stuck and the only way to get a reaction or say a response is when I did my old behaviors before I got help. I dont want to go back there. Well this week on one night I did. From my mum saying a hurtful comment that I felt ashamed and guitly for but at that time all I felt was anger towards her. Usually I keep quiet and dont show it. But I had enough and just exploded.

My partner try to fix the situation. When I look back I see it as he took it as his problem which it wasnt. But when he was trying to talk to my mum and sister. My mum said to my partner how things were better when I use to think black and white. That scared me when my partner told me this. Because my mum could be trying to make me go back the way I was. All the hard work I've put in be gone at the window.
Yes I use to think black and white but I dont as much as I use too.
My mum and sister do every evening after work and call people at there work places horrible names.

Is there any advice or skill I can use to cope with this? I keep having flash backs what happened this week really affecting me.