I feel like Regina is still very angry at herself/doesn’t see her self-worth. I mean this whole season she’s been very vocal about wanting to sacrifice herself. I’m not saying that she’s suicidal, I am however saying that I think she harbors so much guilt that she is beginning to see it as the only way to fix things and prevent further damage. And I think that she thinks that she kind of deserves it. Which is why I’m so glad Emma has been there telling Regina that she doesn’t have to hurt herself to save everyone else.

I don’t think she was just staring at the Queen like that. I think that there was a part of Regina that was looking at even the good half of herself with that kind of sadness/anger.And then she kind of just aggressively covers the mirror. For me the breaking or covering of a mirror in a TV show has always been symbolic of a character expressing anger/dislike of him/herself. Similar to kicking one’s shadow or swatting away a self-reflection in the water.