I love that you qualify this whole experience by adding the fact that this gentleman is tall and Scandinavian. I guess it makes sense, towering Nordic fellas scare the hell out of me too. Anyway, you say you met this guy and that can mean many things - a hand shake in a loud club, a short conversation about the UN or "code" for a brief make-out session during a game of Taboo.

College is a time to not only stretch your academic wings, but also your social and self-esteem wings. This doesn't mean be bold without reason, but it does mean that you should challenge yourself to create opportunities the old "high school you" might have been too timid to initiate.
 
If he remembers you or not, find a way to wiggle into his world and continue your initial conversation. The fact that he may not remember meeting # 1, is his issue not yours. In other words, you have already established contact with the dude; let him figure out why you seem strangely familiar.
 
Lastly, there's nothing wrong with a little recon (reconnaissance). Sniff out his world a bit; surely you have some people in common, friends that straddle both of your fledgling social groups who can be poached for information. Is he single? What dorm/apartment is he in? Maybe he has a job on campus you can happen to bump into him at? Does he DJ a party every Wednesday that you happen to be going to? Get it. Make it happen. Take a cue from the old Norse Vikings - be courageous and explore! Or, the new Vikings - IKEA, be crafty and assemble with care.