"'We can help you. But you must hurry. We don't have much time,' spoke Dumbledore. 'R-really' Draco had stuttered..." The problem: Where could he stay safe? Voldemort is after him and the Order isn't pleased with him, either. The solution: He must go along with the Trio to hunt the horcruxes and attempt to defeat Voldemort. Slow-burn. Canon until the very end of Book Six.