It's interesting that he states he's NC with you but copies you on emails to the therapist which usually would be confidential.
He's communicating with you.
This is not to excuse his behavior- or for you to not have boundaries with him. For your own well being, it's important that you don't get involved in his emotional drama. You can enjoy your family and protect your circle of "normality".
However, it may help to see his behavior as not being about you, or anything you have done, but his own emotions and his own shaky sense of self. This way it doesn't affect you emotionally as much (I think we always have feelings about a family member but it's more about him than you).
Even though their behavior is dysfunctional and even hurtful, pwBPD want what other people want and for my mother - how people perceived her was important to her. One of the unspoken family "rules" was to not speak about BPD mother's behavior and to maintain the impression that she was competent and "normal".
She wanted what every other woman her age wants- to have her grandchildren show up for her and to have people see her as a grandmother. However, visits to her were not always pleasant- and there could be drama. It wasn't something we'd choose to do as a family vacation. We did visit her more than any other family member over the years, but also I had boundaries to protect my children too.
We hadn't visited my father's family in their area. This was a first time for us. A part of the visit was that it was in an area we wanted to visit as a vacation. In addition to seeing family- we did activities, saw sights. There wasn't a way to rationally explain this to her.
For my BPD mother, what she felt was that we were making an effort to visit my father's family and not her and she wanted us to do it for her. However, relationships are formed over years, and we were close with my father's family, and I think this visit triggered a lot of emotions for her. We had no intention of hurting her but due to her own feelings she felt it was.
Shame is a difficult emotion for anyone and especially for someone with BPD. For your brother, I think he feels a lot of shame for not having what is a common situation for men his age- a job, a stable family. He wants what peers his age want but his BPD has made achieving that difficult. That's not your fault or anyone else's fault. So when he sees you with your family, and sees you achieving- it is hard for him to deal with that emotionally.
It's possible that his wanting more material possessions like your house is his way of feeling "equal" to you, however, a house won't fix his feelings. Neither would it help for you to not enjoy or protect your family from dysfunction or try to "fix" your brother by sacrificing any of that. Even if you did, it wouldn't be effective. Sadly- this is their own emotional issues. I hope though that seeing it this way will help you to feel his behavior less personally.


