No, but he was one of Cassie's crazy hallucinations. See, what would really make this totally batshit crazy is if your world was entirely a figment of her imagination but somehow you managed to pop out of it. I'm pretty sure she was like, weirded out that we were dating or something like that, so if she somehow imagined that didn't happen, that's why you think it never happened.

[ Marco's smirking as if he just figured out the extra credit question on a pop quiz; he needs to make sense of this somehow, so as long as there's some explanation, he'll feel better. ]