Why do YOU pry or continue to torture social outcasts?

Just asking anyone who may do this? It’s an honest question from a social outcast. As a chronic job hopper I’ve realized the main reason I even leave jobs is because my coworkers keep trying to get to know me. It’s a problem for me because I have trust issues. With that being said money isn’t everything but it’s definitely important in the modern world. I’ve made it a point to not quit my current job despite how uncomfortable certain coworkers get despite me not opening up to them because even loners need money. Why are certain coworkers so anal and persistent about trying to get me to open up to them if I have expressed that I have no interest in opening up to them? Are they really so threatened by this? Why? And how can I get them to stop trying? I am only working there for the money. I have no intentions of making any friends at work. If I want to make friends I will make em outside of work. Should I just blatantly tell them I have no interest in being their friend?