Been talking to this girl at work for a while, good chemistry, good connection, flirty, went out a few times, all that, but?

I called her one week, she picked up, we said a couple things, I was bout to say somethin else, but I think she hung up, called her twice after that, didn't hear from her from the rest of the week, should I address this at work when I see her, or don't even worry about that?

Been talking to this girl at work for a while, good chemistry, good connection, flirty, went out a few times, all that, but?
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