The sociopath thing really makes sense here to me, as I got the feeling from your post in the DID forum that you have quite a few narcissistic traits. I have read before that not every narcissist is a sociopath, but every sociopath is a narcissist.
I don't have any advice for you sorry, but this does help put your other post in the DID forum into context.
Sociopaths aren't necessarily bad or criminal or hurtful towards others (some can be, but not all are), it's just that they don't experience emotions in the same way that other people do. Like you explained in your post here, they can "act" emotions, as in they know what emotions are socially appropriate in any given situation, they just don't feel them. There are advantages to that. And disadvantages of course.