Do I know you from somewhere?

The message was innocent enough:

Hey, I'm XXXX... how are you? I'd love to talk some time.. learn more about you. How is okcupid treating you? Any interesting characters.. or meetings?

So I start looking at photos. And I realize the guy looks familiar. And that I'm pretty sure I've met him before. And then I realize I've done more than meet him, we've gone out before. Five years ago.

And one of those times definitely ended with some drunk groping and whatnot. *headdesk*

So...how does one handle this, exactly? Ignore him? See if he's any different than five years ago? Point it out? This is just odd.