i am going to guess that her superiors would frown on this relationship, if they became aware of it...

i hear what you are saying and i know it is very important to you, this close relationship so i am gonna try to go easy here...

i am troubled by the situation...i feel it potentially compromises your treatment and i think it is not equal and balanced...i especially do not like that there is no one except her, clinically speaking, that you can talk with about it to sort it out...

i do not want to imply i think she has any ulterior motivations where you are concerned, but i do think the situation makes you very vulnerable, and you clearly are recognizing that too, and are stressed out about it...her reassuring you is nice, but not enough...

i think your best course of action is find someplace, some clinician, someone objective and trained, to help you work through this so that if it is something primarily positive you can work toward resolving the trickier aspects and if it is too dicey for you, you can find a way to transition the relationship in a good for you way...

good luck