And I think I may have under-qualified her level of hurt at the situation. I only said that I may have pissed her off (taken from some info I got from the mutual friend earlier today) , but she may not even care at this point. It's not like she gets into some overtly pissy mood with me or anything or acts hurt and mopey...it's FAR more subtle than that. And I'm sure that if I asked her about it, she would deny it even if she were actually hurt.
I just used this as an example of some of the things I do that, when taken cumulatively, could lead her to have suspicions that I don't like her, and therefore cause her to trust and communicate with me less (which I have been noticing as a bit of a pattern in our interaction).