Do you have a reading block or something? The OP already stated he tried to take the initiative many times but she turned him down.
For the OP, yeah you really need to have a serious talk with your girlfriend. I mean really make an effort to get your point across and work it out and if she still refuse to acknowledge your feeling then I guess it's time to start look somewhere else. I know it's going to hurt but tomorrow's a brighter day. How strong is your relationship with her? I mean do you really love her?