The heart wants what it wants, doesn't it? I've seen enough dramas like 'Brothers & Sisters' or read novels where age gaps and complicated relationships take center stage to know that love isn't always straightforward. But here's the thing—ethics and social norms exist for a reason. Your dad's best friend isn't just some random guy; there's history, trust, and probably a lot of shared memories between them. If things go south, it could blow up more than just your romantic life.
That said, I'm not here to judge. Maybe it feels like the most intense connection you've ever had, and denying that would hurt more than any fallout. But have you considered how your dad would feel? Or how this person, who's presumably known you since you were a kid, reconciles their role in your life? It's messy, and not in the fun, dramatic way TV makes it seem. Personally, I'd tread carefully—some doors, once opened, can't be closed.