When are the right moments to talk to a girl that you want to know more?

just walk up to her. if ur brave enuff do it wen she's around her friends! then tell her everything ur feeling. she will like ur honesty and she WONT forget about u! she sill think about u, but dont stalk her nd stuff. if u see her just say hi or wutever and see her reaction wen she says hi back, then frum there decide whether u should make ur next move....which is getting her phone number! lol!