If she knows and does like you back she will talk to you more, walk near you, sit next to you, make eye contact, twirl her hair, or give you compliments. She may also be secretive about who she likes.
Have a casual conversation, smile, compliment her, let her know you like her company and do not forget to give her a small memento. It need not be a big gift but small things like a coin from your collection or something you made or a small toy. This will remind her of you and will let her know that you like her.
Smiling at you, touching you, or wanting to be around you are some signs showing her interest in you. Her open body language, nervous actions, and personal questions will help you know her feelings. She finds all possibilities to complement you.
Things You Should Know. Catching her staring at you is the biggest sign she has a crush. Look for other telltale cues like blushing, giggling, or making excuses to be together. Listen carefully to what she says—if she asks you about your crushes or talks about how she wants a boyfriend, she's dropping you some hints.
She's definitely flirting if she looks at you frequently, teases you, touches you when she's excited or happy, or texts you random, funny things. She might be flirting if she laughs at your stories, calls you nicknames, makes up excuses to talk to you, or adjusts her body language toward you.
If she looks away really fast, or smiles, or blushes, she's into you. If she casually looks away and doesn't engage anymore, she's probably not into you. If she's talking to you and laughing/smiling a lot, she's flirting. If she's playing with her hair, she's flirting.
She may smile or she may scan your face and give you a double-take. This is a pretty obvious sign that she likes you and she isn't afraid to show it, either. However, if she's nervous and shy, she may look down when you lock eyes. If she looks away when you notice her looking at you, that's also a good sign.
The most common sign of having a crush is the feeling that you have a million butterflies flying around inside you when that special someone is around. It can also feel like your heart does a leap when you see your crush and you feel warm and giddy. Do you suddenly feel nervous but excited at the same time?