It really depends on the person, but some signs are:
When they are talking to you they will lean towards you, or tilt their body in your direction
When you are talking, you will have their full attention
Their friends tease them when you walk by
Their pupils dilate (This one is hard to tell, you don't want to be looking into their eyes watching to see if their pupils do dilate because that's kind of scary)
They will try to impress you
They will always find an excuse to touch you
I dont know but i think something will crush youre brains and kill you
The only way i can say it is you are like really nervous when you talk to them because they are your crush i guess. I had a crush before and it felt like my heart jumped a little when i talked to her. i know ti isn't much but it isn't what everyone else feels it is what you feel for. let's hope you and that crush get together! best of luck bud!
he may be like you,or he just want to be friends with you.....or he want to know more about you
ask question on yahoo answers youd be more likely to get an answer
Does any body know?
Just ask him. He will let you know with his mouth or his body language.
To know if your crush likes you when you are alone with her, observe to see if she will make any contact.
You should be able to tell by his body language. Does he still flirt with her? Look her way? Does he talk about her? When she is near him, does he seem distracted? Trust me, if he did, you would be able to tell. You would just know.
Without direct communication, it can be difficult to tell if someone likes you. However, you may be able to gauge their interest through their body language, eye contact, and overall behavior towards you. Keep in mind that it's always best to communicate openly and directly about your feelings to avoid misinterpretation.
If you look at her body language it will tell you if you dont know how just ask her out.
Ask him!
You should go for it if you know that person likes you go for it no holding back.
No your ugly.
Ask Him.
http://www.wikihow.com/Know-if-a-Guy-Likes-You
Signs that your crush likes or loves you may include: frequent communication, compliments, body language cues such as mirroring your actions or leaning in, making time to spend with you, remembering details about you, and showing genuine interest in your life. It's important to communicate openly and directly with your crush to understand their true feelings.
You know when someone likes a person by their behavior. You can watch their body language when they talk to or about the person to find out. You can also ask them.