Tobias gave a small nod as she spoke, because he could sort of understand where she was coming from. Simms hadn't just been physically violent to people... he had played mind games with them. Locking Chase in the dark, taking Juno and Kiley's clothes - one willingly, but still. There were plenty of people in the house who probably would have wanted to do what Tobias had done and probably had no justification. He hadn't wanted to, but he'd needed to. And it had fucked up his head in ways he wasn't sure he could really explain to anyone.
"You're not a psycho," Tobias murmured. His brows drew together thoughtfully for a moment, and his gaze ticked away from her face, only because it felt strange talking about this stuff so openly. He hadn't done so with his closest friends, because he didn't want them to be uncomfortable, or try to say stuff to make him feel better. He knew people felt like Simms deserved to die, and maybe he did, but... there was still guilt. A lot of it. How could he explain that to people without getting it outright dismissed?
"It's not good, though," he said finally, ticking his gaze back to hers. "It's not. I don't even know... how it happened. It happened so fast and then..." He stopped to take a breath. "I think maybe if you had done it, there'd be no going back from it, because he would have stayed with you for a really long time. Maybe forever. And I don't think you deserve that. He did enough to you."