Something has shifted

I'm not sure what it is yet, but something has shifted. Dad did apologize for flaring up last night, but for some reason, even though I usually am very quick to accept someone's apology when it's given, I found myself unable to do so when dad did it. I told him that he couldn't make everyone around him feel miserable just because he does, and I told him that I accepted his apology so that he would drop the issue. There's only one problem though. When I told Dad I accepted his apology, those were just words. I am not able to accept his apology as  I write this post. I don't know if this is just a passing feeling or not. I know that this probably makes me sound like a terrible daughter. But I just cannot accept his apology.

The next question is why. And so far, the answer is, I don't know yet. I'm working on  that as we speak. What does all of this say about me? Have I become someone who doesn't care and is callous and heartless?