Girl's Behavior

What does it mean? Why is she doing this?

So there is this girl at my workplace who was just a casual friend, but used to speak in a flirty tone with me or like used to speak in a tone where she used to consider a situation where used to imagine both of us as couples sought of and so on. I believe she used to do this just to know whether I could be attracted to her. This went on and also her friends used to speak with me on the same lines and used to pair us both. Gradually I started developing some feelings for her, not much but a bit. Still I think she is not a perfect match for me. So I started to ignore her, not being mean but wanted to keep a distance from her. Now she isn't able to digest this. She wants to know what's the issue. Her friends now ask me whether I like her? Do I have any feelings for her? And if yes, then I should not proceed with it bcoz she is already committed, and they just used to joke around and we're not serious. I am confused now, whether she likes me? I believe she has got a hint that I might like her and hence I am ignoring her , but still she tries to have a conversation with me not as a friend but something like "I love the color of your shirt, I love your perfume smell, I admire your love for music" and so on. I don't see her speaking this with any other guys she knows. If she just wants to be friendly with me, she could just behave the same with me as she does with every one. Her friends tell me that if I don't like anything she speaks with me then I should advice her about the same. I am like she is committed, can't the one whom she is committed with advice her about these things. Her friends know him as well. Why will I be advising this and be like a friend who will give her a shoulder to cry and support her, encourage her, and do all this stuff? Am I being friendzoned? Anyone been in the same boat, your advise is very much appreciated. Thanks.

What does it mean? Why is she doing this?
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