Couldn't be more confused

I'm a 17 year old girl and I had a crush on a 41 year old woman at my course for a long time. (I have previously written about it on here.) Basically, we got along incredibly well. She was friendlier with me than any of the other girls in the class; one girl even stated that she thought she was over-friendly with me. She'd always hug me for prolonged amounts of time until they became a daily thing. She looked uncomfortable if anyone else in the class saw. She'd come up to me and poke my arms in a playful way and she'd say little things that sparked my hopes: "You're cute." "How could anyone not like you?" "I really like you and you know it." We'd get coffee on the weekends and there always seemed to be something there. She'd ask me for hugs in the coffee place and we had that chemistry-filled eye contact. I got her a little chocolate frog once and she started joking around about whether it symbolized friendship or not. I kissed her on the cheek that day and she looked so excited about it that she hugged me once again. I confessed feelings to her a couple of days later and she told me that she only wanted friendship this whole time. Obviously I got very upset and confused. I felt lead on and she doesn't understand how or why. She won't even speak to me. We completely ignore each other. My question is: If you don't like someone as more than a friend, is it normal to act like this towards them, only to let them down? ):