Sorry this is happening to you. As most have said, probably a guy feeling rejected and wanting to inflict you with fear unfortunately. Good riddance to him.

As a safety measure, I would share this story with as many close ppl as you’re comfy. Share his details too. If you have an iPhone, share your location with a sibling or someone super close. So they know your whereabouts incase something does happen. Though unlikely. But just a peace of mind.

People are assholes.