LOL, he is not perfect OP. Your hormones and not your head are doing the judgement. He's just your normal guy, having his flaws and issues, like every guy on earth, that you happen to like. I'll bet he doesn't think he is perfect, I'll bet he even has some insecurities too. He is not a god, don't make him out to be one.
So, don't be shy, he'll probably welcome interaction with you. And if he's single and looking, he will even talk back to you, maybe even ask you out.

If he doesn't find you attractive, welcome to life. It happens. Just move on, that's all. And if he's rude or ignores you or laughs at you, then the hell with him. Move on.

@op - I know it's hard, honey, especially for us shy types, but remind yourself that he isn't perfect (he can't be! no one is) and that you deserve to get a shot with him just as much as any other girl, and he deserves to get a shot with you just as much as any other guy!

I'd say try the smile first. Smile at him, if he smiles back, awesome. If he doesn't, well that's life. I try not to recommend girls to take the first step & talk to guys they don't know because I never do it. I'm shy & I cannot do it. Plus, there's a 50/50 percent chance it works & I dont wanna risk it. But you should live your life without any fears. Follow your heart (don't follow him lol) and if it doesn't work out, don't take it personal. You live, you learn.

Smile and say "Did you see that_____somethingsomething game last night?"