I think it has more to do with having the feeling you "never fit in" no matter how well others treat you. Or should I say "clicking" with others. See there is always that doubt in the back of my mind making me second guess peoples words/actions. I also can tell if I'll like someone even before I speak to them, just by seeing them in the same room and or area. They call it something like magical thinking.... I call it simply gut feeling. I just don't like fake people and those types are easy to pick up on. I can sense something about someone and dislike being around them before they ever get a word in. It's so natural... but that doesn't mean I'm judge mental. It's not my thoughts that are making me do that, its the feeling I get. Call it a vibe, karma, sensing things... whatever.
So its different for each person. You could have just a few of those symptoms listed above or almost all, and perhaps even just fragments of some of those.