If they look at your lips they usually want to kiss you. If they stare into your eyes they like you usually or want all your attention on them. If they play and tickle, this is usually flirting. If they laugh at you, they think you're funny and want you to make them laugh some more. If they play with their hair they want you to notice.
Body language, etc.
you tell someone you like them by your body language.
One advantage of body language is a person can tell is one is happy, sad, or mad. A disadvantage is sometimes a person can be misunderstood by the body language.
Face to face means they can see you. If you are going to tell a lie they may be able to tell by your body language. People can tell a lot by body language. On the other hand an advantage is that you can see there body language. Another disadvantage is if the person you are talking to is violent, they may hit you if you upset them.
i know this isn't the answer some people want to hear but really you can just tell if u want to be one or not. some people are girls in a boys body or boys in a girls body.
You can read a girls body language by how they are acting, if they like you they will hang out with you and if they don't they will completely ignore you roll their eyes and just walk off.
Complement them and show them your interested by body language and Flirtation.
by seeing there faces and body language
Yes, one can tell certain things about a person by observing their body language and how they feel is one of these things. It must be taken into account; however, that some people do not fit the norm and also that body language varies by culture as well.
You can tell by their body or sign language or by what their eyes are saying.
that he likes you
They change when you are close to them. Look at body language and listen to what they say.