Just great, Severus had accomplished exactly what he did not want to do, he had upset Lily. He could see the disappointment on her face. Why did she have to push him? He had told her to leave him alone, that he needed time and space and she couldn't respect him and let him do just that. And then when he stuck to his resolve it hurt her.
God damn it!
But he couldn't let this, whatever this was, end this way. As infuriating as it was for Lily to never listen to him, his desire to make her happy greatly outweighed any resentment.
"Lily, wait." He moved to fall in step beside her, "I'll see you back to your flat, okay?"