He doesn't consider any of those possibilities even though he's always thought that being around him would hurt because she'd associate it with losing Allison. He doesn't understand why she wouldn't, why Scott wouldn't. They can say it wasn't him time and again, but he's never been able to separate the two in his own mind.
He hovers in the door for a moment, then rubs a hand over the back of his neck. "I'm sorry she's not talking to you because of me. I don't know how to fix that."