If it was recent, I agree about giving her time. Let her know you're there for her; she probably needs a friend more than a relationship right now, if the breakup was serious. After a while, all the courage you need is to let her know how you feel. It's important she know, so she doesn't write you off as not interested, but she needs time first. I know I would, put in her shoes.
(http://stream1.gifsoup.com/view2/4717919/women-in-workplace-family-guy-o.gif)