Should I keep trying or start ignoring?

There's a hot guy I work with and I melt whenever he comes around. I'm pretty shy around guys so when my friends found out, they pursued him for me. Now there's some complications- he has never said whether or not he's interested. I'm a supervisor, not his and there's no rule against dating him, and my job is all work and no play- leaving me little time to seek him out. He's a very shy, soft spoken guy but comes running to my aid whenever I need it, even if I already have plenty of other guys helping me out. I'm not a particularly pretty girl (although I'm not ugly either, just average) but my friends consider us about even in the looks department. He's been single for years, holding out for the right girl. However, no one knows what he's thinking. I feel awkward around him now. Did he just like this sudden attention or is there a chance he likes me? All he ever does is smile when people talk about me. He had a party over the summer and I got so drunk out of nervousness and left early. He still tells me three months later he was upset I left so early. He told my friends not to give me his number. Is he waiting for me to make a move? So confused but I need to figure this out before seeing him around the building in the morning. I have never been this forward with a guy in my life and I just want to hide. Please help... As a side note, he also told a friend he doesn't even believe I like him but I think I have set him straight on that now.