My sister definitely suffers from BPD. I know this for sure because I’m a psychologist and I spend a hell of a lot of time with her so I know how she is like. Problem is, she doesn’t know. The one time I did suggest she go see someone she blew up at me and did not speak to me for a month. 

I’d really like a break from her emotional rollercoasters but is difficult to set boundaries when I know something she clearly doesn’t know. I know I can’t tell her, she doesn’t do well with any sort of new information that may seem like a criticism, or an issue she might have (and being told you might have EUPD definitely falls in hat category). She doesn’t do the typical things that would create involuntary contact with professional who would tell her, so if she wants to know it will have to be a choice by her. 

What can I do? I’m exhausted with her.