<p>You should have a serious talk with your parents. Sit down and tell them what you wrote here – that you like Duke the best but you also feel you could be very happy at WashU. Talk honestly about the money difference between the schools, what they could be comfortable paying without going into debt, and how where you go (how much money you get undergrad) may impact their ability to help you with any future grad school plans (ex. perhaps if you go to WashU they could help pay if you go on for a masters). Congrats on three great choices.</p>