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.
If she's interested and forward, she'll be looking at you and will maintain eye contact when you lock eyes. 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.
If they blush around you, laugh uncontrollably for almost no reason, can't look you in the eye, or fidgets a lot, then you have your answer. These are all tell-tale signs of someone who is crushing.
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.
She may have good reasons for keeping a lid on her feelings for you. She's already in a relationship and isn't sure whom she wants to be with. She knows what she feels for you but doesn't want you to know just yet. She's ashamed of her feelings for you but can't help showing them sometimes.
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 someone smiles a lot when they look at you and connects eye contact with smiling, it is usually because they find you attractive. They might also make fun of you and tease you, or try to make you laugh. If someone's into you, you make them nervous. Their heart will beat rapidly from being around you.
If she turns around and smiles at you, she's definitely interested. Approach her right then and there if you're interested too. Usually, only a confident, out-going type woman would do that. But a shy one may too.
Make eye contact when you're talking to them, or hold their gaze for a couple of extra seconds when your eyes meet in the hallway. You could playfully tease them, or send a flirty text after school to let them know you're thinking about them.
How do you know if your crush likes you but is hiding it?
One of the most telling signs he likes you but is hiding it is if you feel like his attention is entirely on you when you're together. He isn't checking out other women. He isn't picking up his phone to read his messages or take calls.
Like touch, eye contact triggers the release of oxytocin. When someone is attracted to you, they subconsciously will try engaging in lots of mutual eye contact. They do this to feel closer to you, and because they are interested in you and what you are saying.
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.
Touch her gently so you don't startle her. If you two get really comfortable she might even let you slide your hand down a little lower. Once she's comfortable with you putting your hands on her waist, grab her and swing her around. Then, she'll be facing you.
There are no rules: You don't have to label yourself gay or lesbian or queer or any other word simply over butterfly feelings. In fact, you don't ever have to label yourself. Sexuality is more than a spectrum or a gay-straight binary with bi firmly in the middle.