Oh, I had the same feelings towards my T when I first started therapy. At least for three months I though I loved her, I imagined her hugging or kissing me, and I had butterflies on my stomach. Then the feeling went away and I suddendly found my T annoying
I never brought up this to my T, only that sometimes I thought a lot about our sessions and that I felt very anxious with her. She didn't say anything about transference, I think she doesn't work with this in her practice.
When I searched about transference, I read that some T's, when they know that transference is happening, may act flirtatious on purpose, to see the clients reactions, or they act very gentle to facilitate the process of transference. Transference is a normal thing that can happen, and can be the object of discussion during therapy sessions. Maybe you can confront her on this, you can say to her that you felt she was flirting in a way, and that it didn't felt unsafe for you. And sometimes T's may not be aware of this, maybe she isn't aware that you are feeling unsafe. I think it can be a great topic for therapy.
I wasn't able to say to my T "I have feelings for you" (plus they went away quickly) but I said to her something like "I feel anxiety with you because I feel you're judging me and I'm afraid of your rejection". Then we discussed about this in therapy, and it was a good and useful topic, I had a powerful insight about the cause of my anxiety.