Dude, forget about her. You're nothing more than a back up plan if something better doesn't come along. Been there a couple of times and I always walk away when I hear that shit. I've heard the line.... "You'd be perfect when I'm 30." That's so fucking dumb. So you should wait 6 years? Fuck that.
The important thing is when the chic contacts you... Don't get back with her. Nobody should have to wait for the other person to want to settle down. If someone is waiting on anything then it just wasn't meant to happen. Most people have a hard time letting go. I'm very good at it.
Tell her exactly what you want and if she doesn't want the same thing then it's time to move on.