Otome games, like any type of media, can influence the way we act and think (IIRC, this would count as social learning, following Bandura's theory?? I could be wrong, not the point lmao), but I think it's a bit besides the point to say we have to differentiate fiction from reality because that should be a given, critical consumption and all that.
On the other hand tho

in my case, Otome games have changed my outlook in relationships. I'm an introvert and my social circle is so small I only have other women as friends, and I'm pretty sure I'm straight so this combo made me single. Playing Otome games made me realize that while I want a relationship with someone who loves and respects me I also am at a point in my life where idrk what I'd actually do if I had a guy somewhere. Where do I put him. What do I do to him. That kind of thing.
Still, I've also realized that I do indeed have preferences when it comes to personality. I want someone who will treat me with kindness and respect, kinda like Edward from Mistonia's hope or Victor from Code:Realize, who talks to me directly and never keeps me guessing, who might be a bit reserved but isn't afraid of showing affection, is willing to learn new things and apologizes and owns up to his own actions like Dante from piofiore.
They're pretty much ideals for me when it comes to their personality and kinda their looks?? I daydream about them in anime style, that only translates into damn I like cool hairstyles irl lol. But I think those traits have a pretty good chance to be in an actual human being in various combinations! So it's not like I'm completely delulu about it. I think I've said this before in another thread, but those scenes of Dante apologizing to us in his routes in both base game and sequel made me realize I'd unconsciously put my bar in the underworld atp. I couldn't believe I'd gotten so excited and swooned so much for what's honestly one of the barest basics of human decency I've ever seen in a video game... So all in all Otoge has been good for me when it comes to relationships!