You must be exhausted.
Two choices:
1. Just hang around with other girls. Even though she's stringing you along I'm sure she still feels possessive over you. I guarantee she'll get jealous if she see a pretty gal on your arm, and you would actually be getting some in the meantime too. Act indifferent toward her too.
or
2. Just stop playing the game and move on. You can try this and that, but in the end is it really worth it? Even if you do end up getting together with her, it's not going to be a meaningful relationship because she likes to play games and there will only be drama.