Is it so wrong that I don't like people keeping things from me?

Mostly when they're things about me that annoy them? I've gone through a really nasty time in my life, partially caused by a close friend who didn't tell me about things I did annoyed her and decided to break off our friendship seemingly out of the blue. I'm still blocked on Facebook and I barely know why. Is it really that bad that I just want to know so that I can stop annoying you when you're around me, or be sure that it's not something really serious?