The Epilogue was only Ginny's dream. This is what actually happened.
What is evil? What is good? We follow the trio through their last year as they discover the meaning of both. Emotions run high and tempers short through this intense mental, physical and magical journey. Excerpt from Chapter 4: With every second Harry dwelled on Snape his anger grew rapidly. He felt the shock and rage when Snape had killed Dumbledore come back full force. He felt the humility and disgrace when Snape had bested him in a dual without uttering a word. He hated the man, and the more he dwelled on it the more he felt a new plan forming in his mind.