“I like a younger woman”

I’m a 32 year old single male and am interested in a girl. We hang out every now and again, however she’s only 25. I worry about age difference as I’m getting older – I know there’s the “half+7” rule and stuff like that, but what is the real socially acceptable age difference? 7 years isn’t a HUGE gap, but I don’t want to come off as weird or creepy.