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Wow with 260+ responses this must be an issue of greater geo-political importance than I realised.
I think the boyfriend should simply leave her and find someone (with a similar outlook) he's happier with then they can both move on with their lives.
Personally in his shoe's, I'd be plying her with a tub of scrumptious ice-cream and a box Belgiums finest chocolates in an effort to get her to invite one of her girlfriends over for a re-run.
But each to his own