The more you talk to each other and "flirt" the more each of you will like each other.
When you look at someone and then break I contact and do it again, it makes them the feel a little more interested in you, like you more. It is a good way to make friends with anyone.
Make more random conversations and then start to hang out. Just go with the flow.
Check out: http://www.wikihow.com/Flirt
google "how to flirt," or ask people who are outgoing/extroverted. But if you only flirt with people who you want to be bf or gf with then you will be missing out on meeting new friends. Technically, flirting is the first step in meeting anyone.. you just go a little further if you both find yourself in love.