Need male advice please? :)?

There's this really cute guy who's in a musical with me. And on Friday, he smiled and blushed when my friend said "you should jump on that!" And then today, he saw me and gave me a head nod. I think he smiled at me once or twice in rehearsals, and we talked for a good 10 minutes on our break. We have some stuff in common, which was cool! What should I do to step it up? THANKS :D