How do you tell the difference between bipolar and borderline personality disorder?

husband diagnosed as bipolar back in 2004. was fine and great while on prozac and depakote, but went off his meds after 7 months. trying to decide whether to get him help or just get me and the kids out because of his behavior. are people with untreated bpd dangerous? does it matter? he has [...] http://bit.ly/qeyGi7