The best thing to do is to just talk to her.
Flirt with her, and smile at her.
Be yourself- thats the most important thing because no girl wants a fake guy
Good luck and I hope you two get in a relationship!
ask her out! take her on a date! but like if u really like her a lot dont just like take her to a movie. find out wat she likes to do then plan something off of what she really likes