What do you do if the guy will not make the first move?

There’s this guy at work who is really shy. When I say Hi to him he always says hi back and gets a goofy grin on his face. Sometimes when I’m working I’ll glance up and notice him looking in my direction. When he sees me looking he always looks down real quick. It’s really cute, he gets really clumsy when he walks in front of where I’m working. The thing is, this has been going on for about three months and he’s never said anything but hi. He seems like a really nice person and is super cute. However,I have this weird thing about the guy having to make the first move. I guess it’s a fear of rejection. What should I do?