I have to chime in here because I found this excerpt from David J. Wallin´s book about attachment in the section "Overcoming the patient´s fear of security" which I think summarize very well what therapy for those of us who have insecure attachment styles is all about.

"That the unresolved patient has trouble tolerating a secure relationship with an empathically attuned therapist is a paradox that defines much of the treatment. Creating a relationship in wich the patient can actually feel safe is essential and difficult. It should be seen as both the ultimate goal of therapy and a precondition for beginning to resolve the patients trauma. This way of putting it will probably sound contradictory until it is grasped that creating a secure relationship and confronting trauma are intertwining processes. As I will explain, the incremental achievment of a sense of safety in relation to the therapist does reolve trauma, while the incremental resolution of trauma gradually obviates the necessity in the patient to reexperience the therapeutic relationship (and others) as a rendezvous with old threats."