Regardless of butthurt feelings on either side, it can't happen. The EU doesn't do special treatments anymore, so Britain would be forced to adopt the Euro, and would not benefit from any of the special "opt-out" clauses it had negotiated before leaving. This is unacceptable to everyone who voted for Brexit, as well as to the moderate pro-Europe crowd. i.e. completely politically untenable.
For better and (mostly) for worse, Britain will spend the next few decades isolated on the European level. Best case scenario would be, in a decade or two, for the UK to join the EEA, but that's still a huge downgrade in every way compared to full membership as British companies would be subject to all the rules of the European Single Market without getting a vote in any of them, in exchange for getting access back to the EU market.