The thing is, Nakano doesn't even want to go to university, so taking a day off from studying to hang out with a boy isn't going to be the end of the world.
Also, realistically speaking, her ability to read minds is going to open up a lot of doors and opportunities, even without going to university.
Worst case: she could make a fortune from playing poker. She might not be able to bluff, but knowing your opponents' cards is an overwhelming advantage anyway.
I say worst case here because gambling is illegal in Japan. I'm sure there are more legal ways to make use of her talents.