**Context:** I've got a new(ish) roommate with BPD. His manifestations include: extreme aggression or depression over seemingly small issues that he perceives as aggression, sudden shifts in his feelings towards people (especially his family, when he perceives them as disrespecting him or offending his pride), and abysmal self-image and self-confidence.


**The situation**: My girlfriend gave this roommate some advice about something minor, and my roommate blew up at her. When she didn't tolerate that, he told her that he felt attacked and uncomfortable. In short, he blamed her for the reaction that he caused. This is the second time that he's disrespected her, and this time it was in public. I need to address this with him, because it's unacceptable behavior.

 I've talked it over with other roommates, and we know that the offender cannot deal with any kind of aggression. He immediately shuts down. Are there any strategies that you guys suggest?  