Long story short.
You are both minors and you have absolutely no legal rights whatsoever of any kind to do jack-diddly-squat.
Even IF (and I purposely stress that IF) you are what you say you are - you've still got no rights, no laws on your side, and no possible recourse until both yourself and the girl in question are over the age of 18. Period. End of story. Stiff upper lip. Bite the bullet. Keep your nose clean. Exercise patience. If this is a relationship that is more than just idiot teenage puppy love then TIME ALONE is going to be what makes it happen. No offense, but you really do sound like a person seeking for people to agree with and/or support a Romeo/Juliet story. I'm all for romantic love, but there's also a little thing called reality you have to deal with and a 16 year old girl running off with a 17 year old boy can only end badly.
And quite frankly, I severely doubt that any person at the age of 17 can afford their own apartment, utilities, and to purchase a brand new Mustang. You're either the luckiest 17 year old kid on the planet, or grossly exaggerating your earning power.