*Do not construe this as legal advice.*

I am sorry to hear about the pain you have experienced from having fallen in love with your therapist. It does seem like Ts should warn us of transference, but then the knowledge of the possibility may interfere with the effectiveness of therapy. So many therapists rely on it, and when they notice it or are informed, they are trained to deal with it. It seems like something got mixed it here. Without knowing the full facts, I would guess that you do not have a legal claim, i.e. a viable law suit. I am sorry. The relationship may have caused you pain but she herself did you no harm in the legal sense. She likely met the standard of care in addressing it and then referring you to someone else. Call up an attorney for proper advice though. You could of course always complain to the licensing board. This is of course my opinion without knowing facts.

*Again this is not legal advice.*