How to know if a Guy Likes a Girl

 Body language

 Eye contact

Nervous when talk with you

Happy when touch you

Make you jealous by flirting with other girls

Show same interest

Nervous when meet you

See the reaction of his friends 

do they smile? Do they turn to him? Do they smirk in a way that suggests they know something that you don't?

Pretending cool infront you 

Teasing you

Playfully Punches

Acknowledge any compliments that come your way 

Stalk you

 Imitates you

Talk with you on social networking site