Some girls brains are rewired in memory causes and the process ogfthinking, but sometimes that girl may just be too shy to tell you that they like you.
You should show signs that you like him (flirt), and then if he shows you signs that he likes you back, then that means he must be interested.
Complement them and show them your interested by body language and Flirtation.
No he is not, stop pressuring him and eventually he will open up to his relationship status.
Show him things he is interested in that you can do, for example if he likes hotly girls be a godly girl.
Us girls are happy peppy people. So, some show that by peace signs. peace :P
yes girls are secretive when it comes to crushes yes but it is different in everyone
You show him signs, hold his hand, do some research about past girls he has gone out with, act more like them. Then you go and ask him out.
I am a guy. ~ He smiles a lot to you. ~ He enjoys helping you with even silly things. ~ He talks to you a lot at parties (when there are other girls to talk to) And many more.
Girls use sweet terms to show an interest in you. Sometimes girls can use these terms and not be interested in anything romantic.
be sweet,charming and show her that you are interested in her. smell nice, smile and laugh.
when she is not being herself.I you see anything that looks like shes not being herself that's a sign.
It may seem stupid but the best sign a girl can give is being able to hold a conversation with input, humor, questions, views. This shows you interest them enough for them to devote their thoughts towards you and your conversation.