I've ghosted guys I've never slept with. Same has happened to me. It was for one of the reasons I listed already.What if you didnt sleep with him and had been talking for a couple weeks....
One guy last year only wanted sex. Our conversations would always turn sexual. I was trying to get to know him and he would start talking about sex. It was irritating.
Another guy, same year, was PERFECT but I knew I wasnt over the guy I had just broken up with. It was only fair that I let him go.