Have you tried to post on psychotherapy sub forum? Lots of people there have crushes and all kind of other feelings for their therapists, sometimes having feelings for every therapist/doctor/professional they see. It’s one of the main topics of posts on there. They might have some suggestions how to approach it (tell their therapist, stop seeing said therapist, only see therapists of a gender they aren’t attracted to etc). It seems to be something that happens often for number of reasons. Posters often do have a good insight on that subforum, so I’d check it out