If you don't mind me asking you.. How old is your daughter?.. Has your daughter been diagnose with a personality disorders? In particular... Borderline Personality Disorder? Us folks with Borderline personality develop an immense relationship bond with a single individual that's currently involved in our lives.. it can be a friend, teacher, therapist,etc... In the borderline community we call this our favorite person.


Here's a link where you can learn more about the disorder.. NIMH >> Borderline Personality Disorder perhaps your daughter may show signs of the disorder?


Your daughter may not want to come open... but maybe she has feelings for this **very close friend** of hers, and shes struggling to accept that her close friend has a boyfriend, and paying more attention to him rather than her.