Well, we're going to have agree to disagree on this one. The 14th Amendment doesn't guarantee anyone's right to marry. You must have missed the 10th Amendment: "The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people." Since marriage isn't specifically mentioned in the Constitution or any amendments the states have the exclusive rights to regulate marriage.
Maybe you should brush up on your Federalism.