Something to keep in mind is that dating and romantic attraction is different from sexual attraction. It's very possible that you could be heteroromantic and only want to date men, but still be bisexual because you find women sexually attractive.
There's also a difference between finding both men and women attractive and actually being attracted to both men and women. Like I'm demiromantic and asexual. I find both men and women attractive in their own ways, I'd just as easily date a guy as a girl as long as I've gotten to know them well though to have a connection, but I'm not actually attracted to either of them.
I will say that the preferences in romance books and games maybe leans more straight, but that doesn't necessarily mean a whole lot because they do tend to really heavily link the romantic and sexual attraction. So you could still very easily be attracted to women but not want to date them because you're only sexually attracted to them and not romantically attracted to them.