What is some reasons for this with this girl acting this way?

We met at work and got close I felt, talked about anything and everything, made her laugh continuously, she’d always be staring at me a far but suddenly when I try talk to her now it feels like something has changed and I don’t know why? I feel like she has distanced herself but it’s confusing because she talks to everyone else except me and then other times she is trying to get me to notice her or grab my attention, talking with other guys and acting like she’s having a great time then look at my direction to see if I’m looking? I feel like she hates me for some reason 🤷‍♂️

What is some reasons for this with this girl acting this way?
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