Sort of like being asked to define one's religion while standing on one foot. There are a couple of references you might check out: A book published about 6-7 years ago called "I Hate You, Don't Leave Me," author's name something like Krickstein; and a 1994 article of mine for Psychiatric Clinics of North America (Shame, Compassion, and the "Borderline" Personality. 17:785-810.) The little paperback book has been very helpful to the spouses of many people in therapy for Borderline Personality Disorder, and the article attempts to revise a lot of concepts in terms of shame. I really do believe that shame is the affect at the core of that condition; additionally, the SSRIs may be of help at various times during treatment.
You are on a roller coaster that tosses you through all the affects at the high end of their range. Good luck in the struggle. If there is anything any of us here on BOL can do for you, don't hesitate to ask.