Small touches and gestures can be a good sign that a woman likes you. If she playfully pats your arm or rubs against you while you are sitting down, it could mean she wants to be closer to you. She also might want to hug you or be open to an invitation to be hugged.
The clues aren't always obvious, but you can see some of them by paying attention. When someone finds you physically attractive, it shows by always making eye contact, always wanting to touch you physically, and frequently initiating conversations.
If a boy really has a crush on you, then he'll be likely to give you all of his attention. He'll turn his body toward you, make eye contact, and won't look around for his other friends or text them during your conversation (unless he uses his phone as a crutch because he's nervous).
So if you notice repeated eye contact coupled with smiling and nodding to everything that you say, you'll know that she has a thing for you. Maintaining eye contact for longer periods also suggests that there is a connection between you two.
If he notices you've trimmed your hair, got another ear piercing or changed your nail paint, he's definitely got a soft spot for you. If someone is teasing you, making a joke about you (even in jest) or acting disrespectfully towards you, he will be the first one to sweep in and stand up for you.
A friendly guy will definitely make eye contact during conversation—it's only the polite thing to do, after all—but if he looks at you randomly from afar, he's interested. If you ever catch him trying to sneak a peek at a part of your body other than your eyes while you do talk, he's definitely interested.
What is the easiest way to tell your crush you like them?
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.
With friends, the look drops below eye level and moves into a triangle shape: we look from eye to eye but also look down to include the nose and mouth. Once we start flirting, the triangle gets even bigger - it widens at the bottom to include their good bits (like the body).
If a girl is staring at you for a while, especially in conversation, she wants to get to know you. This is especially true if she is showing body language signs that she's attracted to you, which could include little touches and fun banter.