I had severe trouble with boundaries and could feel invaded and taken over by someone, even strangers I happened to make eye contact with in a store, or somewhere. This sounds silly, but I fixed it by imagining I'm in a thick concrete fort that I've built around me. It has a door and a guard, and anyone who wants to talk to me has to go to the door first. I might let them in or might not. Somehow that image, which I did over and over in my mind, gave me the sense of being separate and having a choice. I also limited my eye-contact with people, even friends and relatives... the eye is the "window to the soul" and my soul needed more protection. I used to feel I had to look at people and had to listen to them....still working on that.