introduce yourself and say hi, get to know her.
because she is jelous of you
Maybe your crush might like you back, but don't know what to say, or they might not like you and are avoiding you, or might be uncomfortable talking to you knowing you like them.
Because she is shy and she likes you but you dont know it
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.
Mostly, yes. Some boys dont care or think about it and not know. Some boys take it seriously and know, if they also have a crush on them they will just go on as usual not changing mood.
hot girls know that every guy like them.. what are you asking about? do you mean, how to talk to a girl that you think is too good for you?
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.
Walk down the hall and wave or smile. Then he or she will notice.
The shy girl may feel more comfortable expressing her feelings indirectly to reduce the fear of rejection or embarrassment. By communicating indirectly, she can gauge his reaction without putting herself in a vulnerable position. Additionally, she may lack the confidence to initiate direct conversations with her crush due to insecurity or fear of saying the wrong thing.
ask your dad for advice
Not possible . . . but a teenage crush is very possible, and exists mainly in the mind, not in reality.
You will take the opportunity to get to know them and talk to them.