You have a right to secede, but it's not a CONSTITUTIONAL right. It's a right that predates the Constitution, and does not derive from the Constitution. The Constitution is a supreme national government that lays claim to all its subjects, and acts not just on the states, but on the people directly. The only way out is the way you came in--by convention of the whole. Or by force. Either way is by definition EXTRA-constitutional.
Point is that it is a bad Idea. You have the right to poop your pants, but that does not make it a good idea.
>>The Constitution is a supreme national government that lays claim to all its subjects, and acts not just on the states, but on the people directly.<<
Whoa! You may be a subject of the Constitution and its government, but I sure as sh*t ain’t. The Constitution gets its power from the people; not the other way around.
I was born free and I will die free. If it be to protect us from foreign enemes, so be it. And if it be to protect us from domestic enemes, again so be it.