just ask her on a date. but dont call it a date. just invite her to go to a party with you(like a friends party where she wont know toomany people). use that situation to build "social credentials", basically meaning, "hey these people think im cool and like me, you should start to dig me for being so damn awesome". or if you dont have partying type friends, just ask her to go hang out with you doing something/going somewhere.

dont say you like her or anything like that. build up a connection, and dont do anything crazy romantic, just fun couples stuff(ice skating, movies, dinner, something artsy, community fair thingy, etc.). after a while, do something really sweet/romantic and tell her that you really like her and are interested in being boyfriend/girlfriend(dont say it like that though, just flat out ask her to be your "beautiful girlfriend". she'll dig the beautiful part )

so there you go(and anyone reading.)