What does it mean when a woman starts breathing hard while you are talking to her?

She looks at me up and down, and then she looks the other way. She places her hand on my shoulder, and starts breathing hard with her eyes wide open. And I start talking to her and she would hmmm mmmm. And than she says yeah. Why was she acting like this?

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By the way she never did this before and people said I look better better without my glasses on. One day I didn’t wear my glasses, and I was talking to her and she started acting like this. Before she never did.
What does it mean when a woman starts breathing hard while you are talking to her?
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