getting mixed signals...?

I have been friends with a girl pretty much the whole school year. We have been in two classes together over the year, one this semester and one last semester. In the class we had together last semester, I frequently caught her looking back at me (I sat a row behind her), and in the class this semester I caught her looking at me out of the corner of my eye (we sat across from each other a couple rows). I had developed some feelings for her in this time, and I had told her about them. However, my timing wasn't good, as she had recently gotten out of a relationship. She said that she just wanted to be friends, and I told her I understood and respected her decision. Even after that, though, I would catch her staring at me. I wasn't sure if she had feelings for me too, at this point, or if the whole thing had just become a habit. Any ideas? Thanks.