Maybe I'm being too optimistic, but I really like to try to think of all the brothers as potential good friends. Maybe they'll never be your best friend, but they can at least be more than acquaintances.
Actually, what I worry about a lot is whether I'm being too close to someone who really doesn't want to be my friend. For example, as you mentioned in your original post, sometimes I worry about whether I should refer to someone as my friend when introducing them to someone else. Not because I don't consider them as a friend, but rather that I don't know if they consider me as one, and I wouldn't want to make it awkward for them.
Oooh perhaps you have contracted my paranoid disease? But don't worry about being too optimistic it's a lot better then being too pesimistic.
Haha. I've been paranoid since before you were born. :) And the brothers are really the only people I'm optimistic about. I'm usually the most pessimistic, (or, as I prefer to call it, realistic), person you could meet.