"I'm glad you're here, too." He knows there's a lot of good and bad between them. They can't just forget any of it and they shouldn't, but if this place can give them a way to start fresh and rebuild some of what they've lost, he'll be thankful, because he loves her, perhaps just a little more than some of his other siblings.

There are things about humanity that the others don't understand and they likely never will. He doesn't share her want for a human life, but he does love humanity and he loves Sam and Dean. She can understand that. Maybe she can even understand why he cares about Meg.

"I can't be the soldier I was, but if you need a brother, I'll be here for you." He's learned a lot about what being a brother can be from Sam and Dean. He hasn't been a very good brother to the siblings who should perhaps matter most, but he can try to be better to them now.