My wife drags me through her "bipolar-induced drama" on days like that, but I do not mind if I can be of help to her. Being family of someone who has BPD is hard, but not as hard as being the person who has it. I bet they are more understanding than you think and love you enough to deal with it. If you cannot count on family and friends, who can you count on?

P.S. I think you could be a mass-murdering, insider-trading, spouse-beating devil worshiper and the dog will still love you as long as you have food!