Of all the things that Steve has said since he arrived, this is what stuns Thor the most. No matter how many times others argue otherwise, Thor knows that he is responsible for the devastation. That he is unworthy of anyone's friendship, that he is no hero, not even to himself. He knows it, and he is certain that they do too. They would be well within their rights to turn their backs to him.

But here is Steven, telling him that he is still welcome. That Natasha agrees. That even after everything he has put them through - is still putting them through - there is still a place for him among them. Still an Avenger, in name if not in deeds. He does not deserve such friends, and yet... he has them anyway. And it does not matter that their lives will be brief in the long span of years that Thor may have yet left to live. They are here. Now. And even Asgardian lives may be cut short well before their time. He can be certain of nothing except what exists in the moment, and in this one, there is a hand offered in friendship, whether or not he is worthy of it.

His view of the island grows misty, in a way that has little to do with the flow of the weather, and Thor scrubs at his eye. "...thank you." It seems inadequate, but he can't find the right words, gratitude twisted with his own self-loathing until he can't separate them at all. But his understanding with his human friend has never been only about words, and after a long hesitation, Thor reaches out to put his hand on Steve's shoulder. "Thank you," he repeats, a little stronger, and though his smile is faint and hollow, it's a smile nonetheless. "If you... I'd like to see you again."