Awkwardness

So there is a guy that works with me at the bank that I have started to like in the past few weeks.  He took me under his wing and trained me the most of anyone there.  We had lunch together a few times and have gone to happy hour with others from work.  He has given me rides to places and offered to drive me back to my car afterwards.  When I invited a few people to a Flatcar show, he was the only one who seemed the slightest bit interested and he gave me his number so I could let him know about the show.  He texted me a lot this past weekend while he was out of town.  He asks about things going on in my life and seems interested when we discuss them. 

So I have taken all of this to mean that he's somewhat interested.  I'm somewhat interested and I feel I have made that known to him.  So last night I texted him about a get together I'm going to later this week and invited him.  And he didn't even respond.  At all.  Not even a "No, thanks."  Part of me wants to give him the benefit of the doubt and think that maybe he was just busy or didn't have his phone on him or something else that could be true but most likely isn't.  But chances are, he's not interested and things at work may have just gotten awkward.

Advice needed: what do I do from here?  Pretend like I didn't send the text and he didn't ignore me and go about life as normal?  Ask if he got the text, potentially leading to a face-to-face rejection?  Assume he got the text and ignored me and back off from being work friends with him a bit?

(I have intentionally never made feelings for coworkers made before specifically to avoid these awkward situations.)