1. ask her friends; 2. ask her in person; 3. flirt and find out; 4. ask a friend to ask herIf they stop and look at you ... if they look at you a lot ... if they laugh at your jokes ... if they gaggle and act like drunk crazy girls.Here's some help coming from a girls POV. If you've noticed that she has gradually began to get closer to you, ex: sitting with you at lunch, talking with you more, asking if you want to go do something, or hanging with your friends. She may also be mean to you: make fun of you when you do something stupid or have a good come back when you've completely set yourself up for it. Staring at you and looking away or acting like she was looking at something else when you notice. She may begin to take an interest in things you like and when you are sitting by her and either you arm or leg "accidentally" touches hers and she doesn't move and if she does its to scoot closer to you.This is coming from a girl. I'm sort of shy when I like a guy. I flirt back if he starts it, but I'm usually don't flirt with a guy I like unless I can tell he wants to. I'm usually more quite, but I smile a lot when he says something to me. A lot of times I make sure that he has a good "view" of me. When you talk to the girl you like, you should be able to tell if she likes it or not. If she laughs at the things you say, even it isn't that funny, and if she pays full attention to you when you talk to her. I think letting a girl know you like her is always a good thing, because most of the time we can sense it anyway, even if we're not sure about it. If she likes you back, she'll tell you, but if not, she won't think you're weird for telling her. She'll be flattered that someone likes her. So, flirt and if she responds well, tell her.All girls are different, some are the shy type, some are the more active type as in acting a bit more forward, a girl that is just naturally a shy type will express her like for you by trying to ignore u, hardly speeks to you but you will notice her stare(give you glances) and you may notice her try to look away quickly so that you don't catch her, you may even catch her smile at you at times, it will seem very obvious by the way she tries to avoid u. You'll just notice. Now on the other hand a girl that is more active will tend to stand closer to you when you talk with her and stuff... she may won't to keep talking to a bit longer as in dragging the conversation I have much 2 say on this I'm an expert.If you want to know if she likes you get a few people around you and ask them all who they like just so when it comes to asking the girl you like, it will seem natural that you're asking everyone. IF she stumbles for an answer or blushes or is like 'uh no-one' (giggle giggle) or looks at her friend for an answer, then you can be nearly 100% sure (not that good)I am a girl and somewhat shy, but when I like a boy I tend to look over at him a lot and smile when he talks to me (without even realizing it). If I pass him in the hallway I will poke him or hit him lightly or something too and keep walking like I didn't do it. =)A lot of people say that a girl's heart rate gets faster or she blinks faster if she is near the person she likes, but some raise the question "do I really have to measure her pulse to see if she me?" Well no! there is a MUCH MUCH MUCH MUCH easier way. in fact, this is so easy, you will laugh at its simplicty, you don't even have to talk to her, not even look at her, you can be a deaf mute and this will work. Here is how it works: Women are territorial, like cats. if the person you like sits next to you in class, scoot a little bit close to her, like 1/2 an inch (half an inch). since women have their "personal space" and their "other people space", she may move farther away, this means that you are still in the "other people space", you don't want that, you want her NOT to move, ie. let you into her "personal space", so what you should do is: 1. Move closer to her while talking or sitting (not too close, like 1-2 inches). 2. See if she moves away, if she does not, then congrats buddy, she likes you! (because she let you into her "personal space").