Okay, take it from someone who's standing on the opposite side of the fence in this situation.
I broke up with my ex-boyfriend about a month ago. When I broke up with him, I felt totally ignored and thought he was talking to other girls. It wasn't a good reason at all, and I didn't really attempt to talk things through. I just ended it, which I regret like hell, even though I haven't told him that, nor have I talked to him since. I broke up with him for a good reason but went about it entirely the wrong way, and didn't hear him out at all. I miss him pretty badly, but even though I think he still likes me, I can't bring myself to talk to him because I'm pretty damned ashamed of myself.
Point being?
Try talking to her. Just a simple: "Are you angry at me?" could be a pretty good conversation starter. Or you could just move on. It's your choice. Good luck.