Can you tell me how can i cope with my girlfriend's borderline personality disorder?

Be prepared: If you're committed to staying in the relationship with her, be prepared for many ups and downs. She may be extremely sensitive to -- and interpret your actions as -- abandonment, when you have no intention of that. She may have difficulty knowing what she wants, and this can frustrate you. Her mood may be unstable. Helpful book by dr. Shari manning: http://tinyurl.Com/lwgs289.

Borderline : The hardest thing to maintain with borderline personality disorder are interpersonal boundaries. Boundary violations often occur with people struggling with this disorder and whoever your girlfriend is, you're going to have to work on those boundary issues first and foremost, most notably in terms of safeguarding against being emotionally invaded or manipulated by that person.