Well do you have a friend who could do it...when all else fails, send in the friend. You never know, maybe he was to shy to respond or something could have happend to the note.
I could try to send a coworker to do some inquiring, but I'm not sure anyone of them would want to do it. Everyone at work is older than me. And most of them are men. They all know I have a crush on an EMT next door and they laugh at me about it, but they also ask if I've seen him constantly. I think they're curious too, and they all think I'm bold. So maybe they wouldn't have done what I did? I need to find myself a little guinea pig to do some research for me. I'm pretty sure the note was still on his car for him to see, I happened to be at the secretary's door by the front and saw him drive in our direction as he left. He could've exited the other way, which was closer to his car. I think he wanted to see if he could get a better view of the building and the inside. He left less than an hour after I left him the note and it wasn't windy. I'm positive he got it.
Thank you for your advice and for listening! If I see him I'll take Valentina's advice, otherwise I may send someone over like you suggested.