Look for a licensed, experienced mental health professional with an understanding of borderline personality disorder, and some training and experience in mentalization-based interventions. In addition to finding someone with the appropriate educational background and relevant experience, look for a therapist with whom you feel comfortable working on personal, family, and relationship matters.
This therapist can be found in health clinics, private practice, and other settings and institutions.
Screen your potential therapist either in person or over video or phone. During this initial introduction, ask the therapist:
How they may help with your particular concerns
If they have dealt with this type of problem before
The process and timeline for treatment