Sir, answer me one question.
Where in the Constitution does it state that states that enter the Union are forever bound in the Union?
I don't want to hijack the thread completely from people who want to discuss other things, but the Constitution does declare that it is the supreme authority in the land.
"This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any Thing in the Constitution or Laws of any State to the contrary notwithstanding." U.S. Const. art. VI, Paragraph 2
Consequently if you want to "secede" or sever your connection to the rest of the country you have to do so at the federal level, by changing the federal laws or the Constitition. That's pretty clear, isn't it? If it isn't -- if there's disagreement -- that's all the more reason to make sure that all concerned parties are in agreement, rather than strike off on your own.
Under a tyranny, you may have the right to rebel and get out however you can, but if you live in a constitutional republic with free and democratic institutions, you work within them for change. It's an old debate that won't be resolved tonight.