I believe that I can help you.
You seem to be very well versed in the concepts of transference (and countertransference) so we do not need to discuss the aspects of why this occurs. You want to know what you can do about it.
You cannot control your feelings for your therapist. You cannot simply turn them off. You must not fear them. You should not be ashamed of them. These feelings are not uncommon and they do not cross any therapeutic boundaries.
The first and most difficult step is to talk to her about your feelings. She is trained in the issues of transference and you can discuss them openly. She should be able to talk to you openly and without incurring embarrassment on your part, or hers. Initiating this discussion should begin the path back to being able to handle your feelings and reduce their intensity.
Once you accept and reveal your feelings, this will bring some relief right away and unburden you. You can incorporate this into your therapeutic relationship and perhaps it can shed some light on your original reasons for entering therapy in the first place.
The process may be more difficult for you because of the extreme intensity of your feelings, but taking the time to work this out should become, for the moment, front and center in your therapy. You will work it out.
Of course she cannot return your feelings of love in any form whatsoever, and it is a breach of professional ethics in the UK and elsewhere. In the unlikely event that she returns those feelings you should consider ending your relationship with her. As a professional, however, she will not.
Falling in love with a therapist is a normal process and indicates that she is a vital force in solving your essential problems. You cannot escape these feelings, but you can work them out and keep up this vital relationship without letting it go to ruin. Talk to her as soon as possible.
Let me recommend two excellent books for you that will give you a tremendous amount of insight and support.
Between Therapist & Client: The New Relationship by Michael Kahn
Transference And Projection: Mirrors to the Self (Core Concepts in Therapy) by Jan Grant and Jim Crawley
If I can be of further assistance, please do not hesitate to get back to me. Helping you resolve your issues is my foremost aim and I will be happy to assist you as needed.
Elliott, MAE, LPCC, NCC, CCMHC