Maybe you can try just letting her heal in her own time. Women find it difficult to maintain friendships with men who they have feelings for, so you might just want to be a little patient with her. Once she finds another guy, she'll be able to be friends again, I think.
Give it a few days. If she doesn't come around, make it clear to her that you would like to continue supporting the friendship for the sake of the friendship. At that point it's her choice.
You can't change how someone else feels. If they want more than you're willing to give you're no longer 'just friends'.
this has happened to me, and sadly there is no saving :[
Try putting your self in their place and see how you feel...
you rejected her she has return the favor what goes around comes around...