Girl now ignores me after I told her that I still have feeling for her?

So one of my exs still work with. She has been ignoring me and we each do our own thing. Anyways she came up one day and told me that she misses me and do I miss her. I asked her why she missed me and she told me my eyes and laughing talks we had.
I told her that I’m staying late to see her. She asked if I had a girlfriend I said yes and she told me she didn’t have a boyfriend. Anyways I told her that if I didn’t have a girlfriend I would still date her, she told me that she has moved on. And now ignores me again. I’m super confused, please help.

Girl now ignores me after I told her that I still have feeling for her?
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