There are just some thoughtless, immature, unstable and very heartless creatures who roam this Earth OP and unfortunately you had the bad luck of running into one of them.
I am sorry for what happened, know you didn't deserve his meanness at all, that he is the one with the issue not you.
Thank your lucky stars you found this out NOW (sooner) rather than later, after sleeping with him and perhaps developing stronger feelings.
I would have just enjoyed my time in the city and had a nice mini-vaca while I was there.
Hey if life hands you lemons....Well, you know the rest dear.
You deserve much better. And he deserves nothing.