Harry knew immediately that he couldn’t tell Draco the truth. Not now, in front of an audience, and potentially not even in the future, except for perhaps when they were at the point of no return. He could imagine it now: Draco would insist that they found a way to destroy the bit of Voldemort’s soul inside of Harry in a way that avoided the killing curse, and he certainly wouldn’t accept that Harry already knew there was no other way. That Harry had specialised in Horcruxes at the Department of Mysteries, specifically because he had wanted to find another way they could have removed Voldemort’s soul from his own. That he had only given up after over five years of dead ends and forgone conclusions. That they didn’t have another five years to waste. That they were doing this to save the people they loved, not to save Harry.