Why did she blushed a little bit when I asked for her number. Is that a good thing?

Anonymous
So i have been talking with this girl for some time at work, i don't go talk to her everyday to keep it slow. But today i decided to get her phone number, since it seems that everything is good as she is really nice with me and what not. So i asked her today for her phone number and blushed a little. What is more funny, is that after that, her friend came and i say hi and talked to her for a little bit and then she was like "ok so, here is my number!" and then we parted ways.

So am i doing well? Is that a good sign?
Why did she blushed a little bit when I asked for her number. Is that a good thing?
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