"Good," says Susan, firmly, and because she's always been the sort of person to worry, and to cajole and instruct when worried, she says, "You oughtn't lock yourself away in your room like that. Trust me, it doesn't help. Find a routine and do things that make you feel good, even if it feels like seeking that good feeling is a betrayal of some sort." Such as Susan herself, seeking out sex!

She lifts her head then, catching his eye with a piercing stare. "You needn't seek me out if you don't wish to," though she should like to be sought out by Lancelot, "but some friend, at least. Otherwise you're just indulging in being morose and maudlin and while that can feel good to indulge in, it gets rather harder to claw your way back out."