Inclusion Criteria:  Cut off score of 11 out of 15 on the self-reported SCID-II BPD questionnaire AND subthreshold (3 or 4 out of 9 domains) or threshold (5 and above out of 9 domains) criteria on the SCID-II DSM-V (BPD Module) Age 14-25  Exclusion Criteria:  Currently receiving psychological/counselling /psychotherapeutic treatment for BPD Has received psychological/counselling/psychotherapeutic intervention for over 8 sessions in the last 3 months Severe or profound intellectual disability, that would preclude full engagement in talking therapy Receiving Intensive psychiatric treatment at the time of study entry, for conditions such as acute psychosis or severe eating disorder Non-English speaking