Mrs English and I have been together 22 years and in the entire time she's known me my teams have collectively had about three good seasons. As a result, when Forest made the playoff final this year and I was proposing to spend an absolutely disgusting amount of money to go, there was no "you're going to spend how much on a ticket to a soccer match?" and instead she said "you've watched them be terrible all this time, you can't miss it now they're on the verge of actual success".
To this guy: it's two months into your relationship. You already know if she's a football fan and whether she gets it or not, if she isn't and doesn't then just tell her you're not seeing her on a Sunday.