Why don't England just be Independent?

Ok why don't England just go out of the UK and leave it to Scotland, Wales and Northern Ireland think about it England can survive on its on without Scotland, Wales and Northern Ireland because it is very rich and also it is a big country also didn't only England wanted out of the EU and not Wales, Scotland and Northern Ireland so why not let England be Independent because as we all no it is Scotland, Wales and Northern Ireland who needs England it is not England that needs Scotland Wales and Northern Ireland and i bet most English people want England to be a Independent Country and not apart of other countries also why is England still with Scotland, Northern Ireland and Wales when all of them hate England