You hurt her. And she see solitude from you. She hadn't said, it's over. She's hadn't stated she's leaving you. So, give her space.
You hurt her. Now, you can be like Robin Thicke and write songs about it. Still the decision rest with her. So, give her space.
It takes time to make a rational decision. Ask, anyone? Who has been hurt by love?
The pain that you're feeling within concerning her. Is the pain she feels concerning you. For the person, she thought she knew. Seem to have came unglued.
So, give her space that things will change. After all, you want her heart and love to remain.