Why was she so tender to me just now but would like to tear me into pieces in an instant? Why did he praise me for my brilliant talent but call me mean and shameful in an instant? Why is she afraid of loneliness and cannot stand the cold? Why does he say that all misfortunes are due to me? Why does a wise and cultured man sometimes lose his head completely? The answer may be very simple: borderline personality disorder. If you feel exhausted as if treading on thin ice when staying with him but you cannot give up or leave him, then you are not alone. There is already a group of people who have similar experience with you and they have gotten out of the dilemma through hard work. This book is the voice of experience of first-line professionals who go deep into the psychological consultation and assistance. This is a book specially written for relatives and friends of people with borderline personality disorder. In addition to concise and practical skills and rich and detailed cases, this book attempts to convey such a belief that you can help yourself and help your loved ones control your life.