Can I keep the money from a car accident claim without repairing the vehicle?

Recently, someone backed into the side door of my car. Their fault. It did approx $2,000 worth of damage. The adjustor came out & estimated the damage & sent a check for a small amount. Its currently at the body shop now for an final estimate. However, I am not sure I want to repair the car. When I told the adjustor on the phone today that I am @ the repair shop getting a final estimate. He got pissy & said, "i already gave you an estimate, so you dont need another estimate. they are just looking to see if there is anymore damage and if there is I will write them a supplement check to fix it." I said, "ok well I don't care if it's called an estimate or a fart, I will get all that is owed to me." Do I have the option to just keep the money and live with the damages or do I have to have the vehicle repaired in order to go through with the claim? The adjustor is making me feel like I have to get it fixed and he is making it seem like he wont write a check to me, ONLY to the shop. How do I fight this is he give me problems?