There are plenty of examples in The Hobbit of the narrator referring to himself, as well as addressing the reader directly. For example, this from chapter 1:
Gandalf! If you had heard only a quarter of what I have heard about him, and I have only heard very little of all there is to hear, you would be prepared for any sort of remarkable tale.
I don't think there's anything particular that is implied by this: Tolkien was just following the convention of children's stories at the time. Although he later wrote that he regretted the childish tone of The Hobbit. See Letter 234:
Never mind about the young! I am not interested in 'the child' as such, modern or otherwise, and certainly have no intention of meeting him/her half way, or a quarter of the way. It is a mistaken thing to do anyway, either useless (when applied to the stupid) or pernicious (when inflicted on the gifted). I have only once made the mistake of trying to do it, to my lasting regret, and (I am glad to say) with the disapproval of intelligent children: in the earlier part of The Hobbit. But I had not then given any serious thought to the matter: I had not freed myself from the contemporary delusions about 'fairy-stories' and children.