There's nothing wrong about loving your brother or sister; in fact, a deep bond between siblings is healthy and ideal. But when does closeness stop being a wonderful thing and start being...off?
Most people would say your and your brother or sister are just very, very close, perhaps a little co-dependent, yet that's understandable, perhaps, if the two of you have been through the wringer. Still, there a whispers that your relationship is more blurry than properly familial.
Is that just a misunderstanding, because you've only had each other for for so long others wouldn't understand how you've lived, or is their some truth to their suspicion?