Future lovers?? How long will Eunsan be in denial lol

I mean it's not unrealistic that he doesn't think abt them as something forever. We the audience know the story is abt them, so obviously they'll end up together, but how many times you thought abt your hook ups, "yup I'm gonna marry this person and it'll be happily ever after"?

Well Ian practically professed his love for him before. Multiple times I think.