How to let a guy know you like him back?

Well what you should do is just go straight up to him and ask him if he likes you. And if he does than awsome if he doesnt well GET OVER IT. Or you can just have one of your friends ask him. I have been through the same thing with this CUTE guy but he would always go up to my friend and hit on her. So what I did was i just went up to him and was like hey um i was wondering do u like me. and he said yes and now we have been dating for like 3 months. and u dont have to flirt with a guy to get him to like u cuz thats jus saying that u r desperate so jus play it kool n be ur self if ur self isnt kool then just be some 1 else.