I feel so bad for you but really have no answers. Now my thoughts on your problem are first and foremost - he is stalking you -perhaps you could speak to someone in your University and ask what you can do or should do.
Secondly, the person that hired you in this company - did you get to know any of them by name or is there one person in particular that you will be working under. You might want to find out if he is in the exact same area you are going to be. This is all of course, if you feel ok with doing this. Don't any of your friends see that he is stalking you and how he has treated you in the past.
No one should have to go through this and obviously your friends and family just don't get it. Being abused mentally and physically changes who you are and a little support from them would be helpful. I think the place to start is someone at the top of your University - do they have counsellors there - that could be a start too.
I am sorry you are going through such a terrible time, but one can hope he will find someone else and move on. I will say a little prayer for you. Don't make yourself sick over this. Go about
your business and I would look and see what other job options are out there. Yes, I agree you shouldn't have to do that, but it might be an easier fix than charging him with stalking.
Stay strong and remember he is the one with the problem - Hope your day goes a little better today.