The bond might seem odd to those that knew them, but that didn't make it any less strong. And if they were destined to be here in this place, Thorin knew that living with Bilbo was the very thing that could make him happy. And all he wanted was to make sure that Bilbo had that same chance at happiness. If he could do for his kin here as well, then all the better.
Once again, Bilbo showed that kind heart of his by being gracious for even the attempt whether it was successful or not. This was one of the many things that Thorin respected about the young hobbit and it seemed that even here that wasn't likely to change.
"I couldn't find any" he answered honestly; yet another thing that seemed to be different here. "Fortunately, I can hold my ale and you're safe enough with me to enjoy yourself for a little while" he offered, showing that he would look after Bilbo.