Girls, she looks, smiles and shakes her head?

[Anonymous]

so this girl when I'm being a bit silly and grinning a lot, this girl looks at me, smiles at me, silently giggles and shakes her head. What does this mean, if anything?
she also jokingly calls me a creep a lot. An example when I walk up behind her she hasn't me and I make her jump etc.

Updates

+1 y

Bump.

[Anonymous]

Coming from a girls point of view, she already likes you or she's thinking about if she likes you. But make the first move if you like her girls like that

[Asker]

Really? Surely being called a creep isn't a good thing?