Honestly if a guy likes you he is going to respect you and act differently around you. He won't turn his back to you, but instead will try to be close to you. He'll look at you a lot because he wants to look at your beauty :) He'll try to catch your eye and stare at you for a long time or make silly faces at you.
iam in love with this guy but i do not know if he likes me or some other girl
If a guy likes you but you don't know him he may look at you or walk by you whenever possible.
when he says he likes you.
http://www.wikihow.com/Know-if-a-Guy-Likes-You
Not sure how you expect someone to magically know something.
It is ok to like a guy after you know he likes you. That is perfectly normal and a part of life.
You ask the guy.
don't
his eyes will open wider if he likes it
When he has a penis.
You will know if a guy likes you because he will ask you alot of questions and he will try to get to know you better,but don't think that just because he talks to you that he likes you,make sure that they are the right person!!!
what I do is just kind of talk about what he likes or just be funny because a guy likes a sense of humor.