There, fixed that for you, Mike.
To the OP, no telling what your friend's silence (at least in texting you back) means ... maybe he had a little buzz going in Vegas and engaged in a little flirting, maybe he's not interested in you that way, maybe he just forgot to text you back ... who knows? I wouldn't pursue it though, just carry on like normal. The ball is in his court now.
The thing I do know is that you did nothing wrong. You're a consenting adult and he's a consenting adult. And, no matter what the outcome, you're permitted to whine about it all you want.