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Obsessive love is a condition in which one person feels an overwhelming obsessive desire to possess and protect another person, with an inability to accept failure or rejection. Symptoms, if such a term is applicable, include an inability to tolerate any time spent without that person, obsessive fantasies surrounding the person, and spending inordinate amounts of time seeking out, making, or looking at images of that person. Although it is not categorized specifically under any specific mental diagnosis by the DSM-5, some people[who?] argue that obsessive love is considered to be a mental illness similar to attachment disorder, borderline personality disorder, and erotomania. Depending on the intensity of their attraction, obsessive lovers may feel entirely unable to restrain themselves from extreme behaviors such as acts of violence toward themselves or others. Obsessive love can have its roots in childhood trauma and may begin at first sight; it may persist indefinitely, sometimes requiring psychotherapy. 
- Susan Forward; Craig Buck (1 January 2002). Obsessive Love: When It Hurts Too Much to Let Go. Bantam Books. ISBN 978-0-553-38142-9.
- Hodgkinson, Liz (2013). Obsessive Love: How to Free Your Emotions & Live Again. Endeavour Press Ltd.
I believe that with obsessive love, time is no healer at all. The experience of obsessive love can be likened to dropping a stitch in knitting, and never picking it up. The knitting never quite looks right from then on, unless we unpick it and start again from the mistake.
- Derrow, Paula. (2014-01-14). "When normal love turns obsessive". Cosmopolitan. Retrieved 2017-03-18.
- Peabody, Susan (1995) . Addiction to Love: Overcoming Obsession and Dependency in Relationships (illustrated, reprint, revised ed.). Ten Speed Press. ISBN 9780890877159.
- Moore, John (2006) . Confusing Love with Obsession: When Being in Love Means Being in Control (illustrated, reprint, revised ed.). Hazelden Books. ISBN 978-1592853564.