Thanks everyone for the lively discussion... Sounds like the word "love" has different meanings and contexts for different people, and it probably depends on your individual therapy situation.
I guess for me I just wonder about the boundaries... I don't want to get confused about her role in my life. Sometimes therapy is such an enigma. Such deep relational stuff that you do, but she's still also a professional and I pay her. I know it's genuine coming from her - that she really does care.