What should I do about this boy, I'm stuck?

Today at college I met this boy who's on the same course as me. I'm really shy so I didn't go up to him, I just gazed at him from afar and I was smiling too (he's so cute!). Then he caught me doing it so I quickly turned away feeling embared and shy! Of course blushing! Lol then later on throughout the day I caught him looking at me, then looking elsewhere...what should I do??? Lol everything seems harder when you like someone so help please! Thanks.