Get a grip.
Has the UK economy been destroyed? No, the FTSE 100 dropped 3.15% on Friday, reacting to temporary uncertainty, and is up 1% on last week.
European markets fell far more, reflecting the fact they have more to lose from an acrimonious Brexit than the UK does.
What is narrow minded about voting to leave an anachronistic, sclerotic, anti-democratic political union, to which the UK contributes more money than it receives back, and from which the UK imports more than it exports to?
In all likelihood, the UK will leave the EU, but retain access to the single market through the EEA. This will enable us to enter into free trade deals with the rest of the world, which we are not able to do as EU members. There is nothing narrow minded about that.