He's ignoring me and I don't know why!!!

So I was pretty close with this guy...and we talked on the phone for hours and everything. That went on for around a month. We weren't a "thing" or anything like that though. We were just friends, I guess. I mean, I wanted to be more than just friends but I didn't tell him because he had this whole thing going on with his breakup with his ex and he wasn't really ready for a relationship. (according to him.) Anyways, he's ignoring me now... He's not calling. He's not answering my texts. He's never online. Of course...he MAY be busy, but I doubt it because even if he is busy, he always answers texts within about 2 hrs. The last text he sent to me was emotionless and about if we had to go somewhere. (this was like...3 days ago.) So now, I'm just ignoring him back, cause I don't know what else I should do.. I mean, he'll talk to me if/when he wants to, right? What do you guys think is up and what do you think I should do about it?
He's ignoring me and I don't know why!!!
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