He guesses it's as good a time as any to come clean because hoo boy.
"Jeremy, I'm an asshole. I come from a world of assholes, I speak asshole better than I speak Korean. My father expects me to get over this gay bullshit so he can arrange me a marriage that will give Samsung a good partnership with some other big company, I was raised in a den of vipers.
"I'm also a slut. When I met you I was planning to get a fuck or twenty out of you like I do sometimes and then dip when I got bored. Things got a bit—out of hand—when you turned out to be from thirty years ago—but you really, really shouldn't be in love with me. When you can get out of here and interact with the world for real you can find a good boy, a good man, who isn't an asshole and doesn't come with my baggage, who'll be good for you. But I'm not good for you, or anyone else. I'm not good."
He delivers all of this matter-of-factly. Not like he's feeling bitter about it or like he's apologising, just as an objective description of a value-neutral aspect of reality.