There are numerous signs that guys give while they flirt with you.
Some pertain to their body language, some to the eye contact they make, some about their way of talking, etc.
But I recommend you to read this guide called "The Fastest Guide to Flirting".
Specifically for your answer, visit this page below in the guide
http://blogjeez.blogspot.com/2011/02/signs-of-flirting-in-guys.html
he will flirt with you and give you signs that he likes you .. :D
If he shows signs as smiling winking and tries to make physical touching and complementing then you can tell he likes you.
There are many possible signs that a guy likes you back more than as just friends. One easy way to find out is to simply ask him.
A guy's real intentions can be difficult to tell,
You can tell when a shy guy likes by observing a few signs. If he likes being around you, laughs at your jokes, compliments you, and does nice things for you, this may mean he really likes you.
Look for signs. Like maybe if he makes you laugh alot. Or maybe he looks or stares at you.
What_are_the_signs_that_a_guy_likes_you_back
Looks at you a lot
Some signs of attraction are wanting to hang out, touching, flirting, but the only 100% effective way to tell is to be honest and ask.
The way that I can tell that a guy likes me is by his actions. Does he do nice things for you that you do not see him doing for other females? If so then most likely this guy may like you. Another way that I have been able to tell if a guy likes me is if they constantly keeps contact with me. Meaning that everyday you can expect this guy to contact you rather it's through a text message or a phone call or even myspace or facebook. In saying that there are also times when a guy will not give off any signs to show you that he may like you. In that case you can just ask him does he like you.
Well has he given you any signs of you thinking he likes you?
he would be constantly looking at you