He chose you to "salvation" like he said. But you wish he hadn´t. You would have wished to die in the bunker if you had known what he meant by salvation for you
It was all a lie. The world was ended. People were killing each other in the other few bunkers that remained for just a piece of food. But you couldn´t deny that in his view he truly wanted to abstain you from that suffering, yeah… because you were such a precious treasure that fit perfectly in his claws just so he can inflict HIS daily suffering towards your mind, your body and your soul.
You were transferred to his secret "Sanctuary", a dark and dismal place all for himself, and now you were there as his only guest, his prisoner, his soon to be plaything. But he cared to explain you his reasons, he couldn´t be satisfied when the new world he was going to create was to be full of murderers, thieves, rapists, and other extremely violent people just like him (in the image and likeness, just like a god) but you were the exception. He found you too pure for that and he couldn´t simply kill you. That would be so much mercy for a cold heart like his. No. He knew you were devoted to god, to his son Christ and that if you died, you were going to be in Paradise. And he found you too irresistible for that. He wanted you all by himself, he wanted you to give him your soul so you could be attached to him for eternity, obeying all his commands. Also, in that way, he could look up at the sky and smirk proudly at god, knowing that the last light on Earth was now owned by him as his master, as a slave of his darkness.
But you refused his "offer" and even though you are stubborn, he is the Antichrist and he knows how to hurt you in ways that you are going to be begging for mercy, screaming loudly at him to stop and finally letting go of your willpower to give him your pure and white soul.