No, YANBU. I'm sad and scared too.
Tunip, it will be close, that's the problem. No way will it be a landslide. And I totally agree, it will just cause festering bad feeling, whichever way it goes.
I think the fact that it can be decided on such narrow margins is a massive mistake and deeply undemocratic; usually referendums on comparatively small issues of constitutional change require an absolute majority, and this is obviously a much bigger deal than that.
As someone else said, people can't just change their minds in four or five years' time.