Here's a little heads-up for all you DUDES.
  A girl looks at you.
Okay.  Weird, right?  Wrong.  She's really thinking about you.  She really wondering if you were just thinking about her.  Otherwise, why would you look over?  Now she's embarassed beyond all reason that you caught her staring at you.  She'll probably go home and cry in the shower.  While you look at her for that split second, her emotions flow out of her like a waterfall.  Her heart pumps faster, and she's in heaven, just for that brief moment of eye contact.  Right now, she's really praying to God that she can have the courage to say hello to you.  So why don't you go over there and say hello to her.
  You like her?
Just tell her.  Don't be afraid if she doesn't like you back.  If you like her, odds are you have some sort of good relationship with her.  And that means she likes you.  A girl is going to love any boy that is nice to her.  She'll fall in love as soon as you say those three words.  Believe me, she will.