Yes. [But he doesn't want to talk too much about it right now; he doesn't want to burden her with the things he went through growing up, nor the problems he's facing at the moment. There's no need to cause her to worry any more than she already is.]

You can think of it as a potion that helps put you to sleep. It's a liquid that you drink, usually made of herbs, but using it for too long can make it more difficult for you to fall asleep on your own without the aid of it.