Ask him.
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Not sure how you expect someone to magically know something.
Get to know him better.If he acts interested in you,you know,if he acknowledges you and talks to you,there is a good chance he likes you.
Do you like him? If he likes you, you'll know. If you can't tell, then he probably isn't that into you.
You can know this by the things the guys says and do to you. Those are signs.
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!!!
I say if you know he likes you ask him out only if you know for sure so you don't get embarrassed if he says no
well, that depends on if you want to know if he likes you or not. if you dont want to know if he likes you, then you should probably move on.
The only sure fire why to know, is to ask her. You could try going off of body language, like if she stares at you or smiles at you. But you'll never know until you ask.
1If he gives you a potato then it is true love
ask her... its really the only way to know for sure!
See if he tells you again and if he is laughing or snickering a lot