I would like to know how she was thinking of me?

I'm a male who started work at a company where I met this girl who I was helping. When we first met, I got attracted to her, and she had a crush on me. I could feel she liked me. I was helping her with many things, and she said to me that that "this would be the last time to see her face for today". I wanted to reply back, but I couldn't, but I happened to go away after that meeting for a week. When i came back, i was always said "hi" when i saw her the whole way. We don't work in the same department. It was too difficult for me to go and talk to her, but all of a sudden, after she was looking at me the whole way, smiled and said "Hi", she was a liitle different, and looked down to the ground when she saw me. When we chatted, she used to write my name, but she stopped doing that and just said Hello! when we have to chat. I'm trying to know if she was really interested, or if this is just an illusion.

Thanks

I would like to know how she was thinking of me?
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