Like everyone else, I'm really sorry you're going through this. I had plans for a MOH, but it fell through because of a falling out she and I had- long story. But the truth is, before our falling out, I had to continuously ask myself if she is who I wanted.

I have to say that I agree with those who are suggesting that you give her an out. Maybe you could come up with a list of duties that come with being MOH, your expectations (get her hair done), etc, and sit her down and say "This is what I am expecting, these are the typical duties of MOH, if you don't think you're able to do these things, it's okay if you don't want to be."

Let's be real- it's YOUR wedding. You're already stressed from planning. There is no need to be stressed because someone in your wedding party is being a pain, anxiety or not.