Obligation and Trust

To be accused of confusion, just for being discreet, seems quite irrational, but it happens. That said, it makes me wonder; "Am I obligated to do and feel certain things?"
     This, I ask with real confusion, for people have made me feel more like a villain; an abnormal person, for not doing or saying expected things. Yet, isn't such obligation only needed when there's trust in between? Certainly, many disagree, but personally, I think I'm only obliged to do and say certain things, when I trust this other person -- It's not simple, for trust is not easily acquired.
     However, people drag me down and make me feel bad for such things. I know I can be difficult, but I also know that as understanding as I can be, people can be kind enough to humor me and be as understanding -- Ask me, and I will answer, but do not assume if I decide not to give an answer, for I will have my own sensible reasons...

     The main point is that no one is obliged to do anything unless it's their responsibility, and I'm sure that adults are only responsible for one another in very rare cases, and those cases require, again, a great deal of trust.