Most Helpful Guy
as a guy, I can see things from his perspective.
the smile and wave may have been because he was working. he may not have been able to talk.
here is an idea, and itll give you more of an idea of what he's feeling toward you.
get 2 of the type of drink that you know he likes, and walk into work off break and say something like... "oh I had a coupon for two! want one?"
judge his reaction.
i know if a girl told me she likes me, and then she brought me drinks and snacks, id know she was serious and it would attract me to her! the thoughtfulness is attractive.
message me and let me know how it went!