Sorry, -forgot, and missed edit:
One thing I think I realize- not sure if it's ptsd related or due to abuse- but I am too sensitive. Not as in just 'reacting to everything' (though do that internally too, on a bad day), but really anyone else's sadness makes me sad too, etc.
With abuse (someone who's experienced it), one knows it 'infers' at the very least, the abusing party doesn't care, but due to necessity and/ or dynamics and or no alternative the abused person (or child) remains. So you learn to 'accept' what upsets you and not show it and 'carry on'. So in any relationship, even without abuse, it becomes difficult to discriminate (or know) when you feel badly if you are 'justified' in feeling that way- is it inappropriate treatment towards you, and therefore you 'should' react (in a healthy way), or are you just being 'too sensitive'? (But on the other hand, abusers say that too..)
So I find- or perhaps also feel- that the best indicator is the totality of actions in the relationship, and past behaviours. Especially if it's not an abusive relationship, or is one of long-standing or importance, I try to think (at least after-the-fact) "How important is this", or to let go of it.
I apologize if this is of no usefulness- every relationship is so different.
But ptsd doesn't give anyone the right to not be responsible, or kind, or thoughtful.
I'm so sorry Ivy, I know it feels awful and can breed doubt.:(