Most Helpful Guy
I would recommend that you don't spill the beans to him while he is at work. Next time the two of you work together, ask him if he wants to hang out with you and some friends sometime. Ask him either as you are leaving for the night or as he is. Hang out a couple of times (literally, like once or twice), and then say "hey, this is what I'm feeling here". I agree with distant down there to an extent. It's not like he will see two different girls, one when you are in work uniform, and the other in civis. However, I do recommend wearing regular clothes. If you think it will make you look more attractive to him, then by all means, do it.