Why do I always assume the best of people? Is it out of an innate tendency to be nice to everyone I know or don't know?
Why do you do it, if you do at all?
I'm not trying to be all teenage-emo-phase here but seriously. No one cares. And I'm HONESTLY not sad or pissed when I say this. People genuinely do NOT care about anyone other than themselves. And when it so happens that someone breaks your trust/heart/illusion of their niceness, it hurts. And that's not fair because you are doing the same to everyone else around you and not realising it.
Take an example. My friend X. We're really good friends, or so I presume. We have a few arguments over work. All sorted. We have a few personal arguments. Those sorted too. Apologies made, accepted. Everything seems fine. Untill X turns around and tells another friend Y that he cannot stand me.
WTF is that about? I was in front of you for so long. All you had to do was say it to me. Or maybe not sorted things out after one of our fights. It's not as difficult as you think it is. It will probably feel less harsh in the long run.
I don't know what to do apart from not care.