Yup. Same here, almost completely. I see someone, even family, and I'm quite indifferent as to what happens to them. My grandfather whom I was quite close to died when I was very young. I never understood why everybody was crying. I never shed a tear, except around my grandmother because I thought she'd want to see me "mourning" for him similar to how she was. But I never really felt anything.
For the most part, logic rules what I do. I hear so many people talk about their "passion" and enjoying what the do and I have no idea what that even means. I've struggled my whole life until recently. As you said, manipulating people (definitely exs, they were the easiest) and even family to a point. I never really had many friends, and I was fine with that.
But I finally found a girl (and in turn a true friend) who accepts me for me. She's got a background in Psychology and other brain stuff, so we both kinda feed off each other. It's pretty amazing. I also realized that a long-time acquaintance of mine is also a sociopath, so it's far, far more common than you think.