you should play smooth and say hi and say nice things about them.
It probobly means that her parents know about her crush and don't want to embarress her.
i might be wrong but (I'm a girl) normally when i get nervous around a boy i normally like them or is scared of you but i mostly find if i am nervous around boys then i have a crush on them i hope this answers your question
Mabe the girl knows the brother and trusts him, or mabe she just needs somebody to talk to about her crush and wants to know what to do in this situation.
Being nervous around your crush is normal. You see, a crush isn't just like any hot boy/girl. Your suppose to be nervous when you talk to her/him. The key is to pretend that that girl/boy is just any other girl/boy you talk to. If your a loner and you don't talk to girls/boys, pretend that she/he is your mom or dad:)
Im a girl and I tend to do that because im nervous around my crush. If you know she likes you and you like her ask her out.
a smile is kind of a more flirty way of saying hi
she has a HUGE crush on you. and alot of feelings so dont screw it up!
Sometimes when the girl is shy and doesn't know what to do or how to act in front of him she will get nervous resulting A different tone of voice
You know when a girl has a crush on you when she either tells you hi or gets shy and nervous around you, stares at you often, and then looks away when you look back at her, and if you hear her friends giggle, whisper, talk, and stare at you as you walk past their group.
Did she actually say she had a crush on this person? It sounds like she doesn't want them to know either that or she is extremely nervous.
Why, did you do something?
It means that you are nervous about your crush.