Well, you miss her, honey; it was a terrible loss. It strikes me that the dream, painful as it was, is part of the grieving process, and slowly but surely you're working through the sadness... It may take a long time.
That mirror photo is utterly adorable and a wonderful memento for you.
Maybe, when you're ready, you might think about another keet/budgie? You seem like a great birdy parent, and could offer love and a good home to another budgie. Take time to heal, though.