I have the same questions myself if I do have some form of schizoid personality.
I ruled out aversion to openness. Because I get bored easily.
I ruled out conscientiousness. It's just my unavoidable but solvable hypersensitivities.
I ruled out introversion. It's just my body, really.
I ruled out agreeableness. It's just my damn mood.
I ruled out neuroticism. It's just a stupid program.
I still get attached. I still enjoy relationships.
I still enjoy social moments if it happened to fit.
I just have different expectations and preferences.
That doesn't say much about my lack of interest in making friends and socializing.
As far as I know, my lack of social interest is not a trauma response.
But yeah I agree with relationships being an interruption of some sort...
But since my current inclination is not being strict on schedules, I may not mind at some moments.
While I like keeping secrets and things to myself, I also tend to over share due to my still developing social skills.
I'm just still learning how to filter things, how to be way better at timing -- after years of not having a space to learn that.
Well...
Even if I get slightly sick, unprepared or still 'grieving' (whatever the frick that means to me), I'd end up acting schizoid like.
Because I can't ignore internal stuff. I'd be too 'withdrawn' because all my time, energy and focus is in the internal and no space for the external.
I just need to find a way to stop having random ails or ways to be less internally sensitive so I'd stop 'acting rigid'...