Guy's Behavior

My coworker/crush is acting distant all of a sudden?

Okay Guys I have a question that's been on my mind as of the last couple of days. I have a crush on my male coworker. I recently got transferred to another side of my company's building and just met him a few weeks ago even though we both have been with the company for years. We instantly got along great. Fun, laughing, teasing one another, stares from across the room. And, from my point of view, yes flirting. Holding eye contact, close proximity, Etc. He always addresses my name when saying hello to me. I'm not sure if that's any of significance or not. But, he uses my name a lot. I don't know if that's just his manners or what. Anyway, I want to make this short. All of a sudden, out of the blue he is ignoring me. I mean, he said hello in passing the last two days but that's it. It is a little out of character being that he typically sticks around and helps me with my work load. Now, yesterday he said absolutely nothing. No "hello". I'm very confused. I smiled at him and nodded hi but I don't think he noticed. We did make eye contact from the opposite side of the room but we both turned away. I haven't said anything rude or disrespectful and I'm not sucking up his oxygen the entire shift. So what gives? GUYS, if you had a coworker and she was friendly and you liked conversing with her in only a platonic way would you speak with her every day and all of a sudden not address her? Even when you two are three feet apart? It leads me to believe that there's possibly something more there. I mean, if you two are "friends" you would say hi/what's up even if your in passing and busy. Not just eruptly ignore their existence.
My coworker/crush is acting distant all of a sudden?
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