Guys, if a girl act like this... what would you think?

If you're a guy and you see a girl act in the following ways around you, what would you think is the reason?

If she:
1) Is nervous when she sees you
2) Gets flustered when she sees you
3) Acts shy and doesn't know how to talk to you
4) Smiles a lot when you do talk to her
5) At times avoids standing close to you and sort of "runs" a little at the sight of you (out of nervousness)
6) Is too afraid to make eye-contact with you

And yet despite all this she still chats, makes jokes, laughs and talks all the time with you ONLINE but not in person.

What is the reason behind her behaving this way with you specifically?
Guys, if a girl act like this... what would you think?
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