Advice Please?? :)

I have a friend and she likes this boy who's in our class and thing is I like him too and MUCH more than she does, but nobody knows that. I know that she will get over him soon so I don't have to worry about that..
And thing is I've had crushes before but I've never talked to them or anything but with him he's on my msn list and I feel proud of myself hehe I had enough courage to add him I guess...

My question is
How do you make it obvious to a guy YOU like him.

How does he make it obvious HE likes you??

Don't tell him that you like him if he likes you enough than he will ask you himself!!

You just know!!

girls always think that the guy finds out that the girl likes them through how the girl acts. that not true. the guy finds out from someone else and then he will let u know. so the best thing you could do is to tell someone and have them tip him off a lil. guys are oblivious to everything. that why i love being a guy.

just flirt with him alot but if you are a shy girl then just try to get close to him trust me it works both lol!!!!!
well if he cant stop starring but like i say every guy is different

I've tried flirting but I don't think he gets the message :(

Like I was talking to my friend in math class kinda and i was laughing but i looked at him still smiling and he looked at me and then looked away right away and stuff, he always looks away:( grr