Unfortunately, there is no borderline personality test that will tell you definitively if you meet diagnostic criteria for borderline personality disorder (BPD). BPD is a complicated diagnosis to make, even for a seasoned clinician. BPD is frequently confused with other disorders, such as bipolar disorder, and the symptoms can be masked by other conditions (e.g., depression) that frequently co-occur with BPD.
The only way to know for sure if you have BPD is to see a qualified mental health professional and have a formal diagnostic assessment. This is probably not what you wanted to hear -- many people are nervous about seeing a professional and would prefer the go it alone. But, getting professional help is essential for people struggling with the symptoms of BPD, and it is the only way to get a conclusive diagnosis and get on track for recovery.
American Psychiatric Association. "Practice Guideline for the Treatment of Patients with Borderline Personality Disorder." American Journal of Psychiatry, 158:1-52, 2001.