I have felt these emotional sensitivities very strongly.
To the point it has made me want to ctb or act out in destructive manners.
For me, it's BPD.
There is little I fear more intensely than loss and abandonment.
In fact, I have become obsessed with it, throughout my whole life.
So I learned to pay attention to the most minute, the smallest little signs in social interactions.
Is someone or something going away forever?
When there are hints of rejection, I freak out.
It got to the point that eventually, I started fearing it so much that I would bring it on myself.
If my emotions got to me enough, I would intentionally destroy/throw away treasured belongings I thought aren't guaranteed to be safe and that I feared to lose.
The same for social connections.
And in my grandest masterpiece, even my literal Green Card.
Which my entire life was based around, oh.
I think a massive part of what drives me to ctb nowadays (reasons were different as a child) is that I fell so deeply into these fears of loss, abandonment, and rejection, that I ended up rather choosing to break everything and die because it is "certain" and "safe".
No more loss, no more abandonment, no more rejection, and even no more suffering, once I am gone.
of course, in hindsight I regret all that immensely, because it took away my choice in the final moments.
Life is spontaneous, and we learn more and change our priorities as we experience more.
Maybe I would not feel the same way had I actually chosen this route, but the me that walked this destructive path (so, this reality) believes trying to learn how to cope with these emotional sensitivities would have been better.
Induced loss, at least in my experience, feels just as painful as arbitrary loss, except it is an even lonelier experience after the fact, because you can't even talk to anyone about it properly.
("I did it on purpose" vs "this and that happened and I couldn't stop the result".
Which invokes more sympathy, more understanding?)
And I did notice over time, even when you mess up, someone leaves, someone rejects you etc. (which has happened on VERY intense levels in my life, mind you), it's not guaranteed to be the end.
You might see them again, you can make up.
It takes... time and effort, sigh.