I realize this, yet seem to be unable to detach myself from others in this way. At the height of my disappointment I become apathetic (or pretend to anyway) but it's not a state I can sustain.
Why were you expecting to get mad?
An example would be someone not meeting my idea of how one should act or be willing to do for someone they care about, like not finding it worth the time and effort to drive for an hour just to be able to spend a couple of extra hours with me when I would willingly do so without question. In this person's mind: what's a couple of hours more or less? In my mind it is a sign that they care less. In other words, I expect them to be as self-sacrificial as me and it saddens me greatly when this doesn't happen.
With LSEs I've noticed that they seem to compensate for this by acting overly caring when they realize I'm feeling this way and somehow always find a way to show me that I'm wrong, restoring my faith once again, only for it to reoccur at some point of course.
This is just a random example, probably not the best.