Can't stop, don't be. Don't let this dork control your life like this. just contact your service provider and let them know what has been happeing and take steps. Folks who have had trauma are often easily noted by bullies of all types if we don't make sure we send the opposite signals. I had to learn to do that.
Dear, if you can bring yourself to, I would suggest a martial arts or self defense class and stick with it. teach yourslf to carry yourself differently. I learned to do so by - of all people - kids in the inner city school I was bussed to. This person has probably picked up the fact that you are high anxiety and is playing off of it. Most likely he has no connection to your past. Don't fall into the old role that he is chosing for you. In reality, you are free to chose your own. Huggs, sweet can't stop crying. I wish I could put my arms around you and give you a big hard hug and stand behind you in body as well as spirit and tell you, time to make the wanna be hunter the prey, dear.