Well if your future wife is a U.S. Citizen and she files for you, you are going to get a Green Card first! And assuming that you both stay together. After 3 years of having your GC then is when you can apply to become a U.S Citizen.. hope this helps!
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Sent: 12/26/2014----Received: 12/29/2014
Receipts: 01/07/2015---- Biometrics: 02/06/15
Received RFE Notice: 06/11/15-- USCIS Received RFE: 06/15/15
APPROVED: 06/19/15