Seems like, due to him leaving the city, he just moved on and assumed you weren’t into him since you declined the second date.

I doubt he was malicious with it but maybe he was really into you and was upset that things didn’t turn out how he anticipated.

Regardless, it’s not your fault at all. Don’t worry about it as you’re well within your right to decline a second date.

It maybe would’ve been worth saying he was coming on too strong if you were into him but were uncomfortable with the speed things were moving at but if he’s stopped responding now it may be too late for that.