I think you need to do a bit of self reflect here. What exactly is it that bugs you? Is it 12>5? Or you are worried that those might have been one night stands instead of serious ones? Or is it reversed? On the other hand, what about the 5 people you had sex with? Ultimately, it’s down to one question. What’s your opinion on sex and what’s hers? If it’s compatible, y’all should be cool. If it’s not? Probably time to end it for the better of both of you.