I feel like I'm such a bad sister to my brother. 

It sucks that I don't know how to express my love for him. How can I be a better sister? What should I do? I know how to provide material things for him -- buy him the shortshift or whatever that is called, buy him this and that, give him allowances, etc., but I ultimately don't know how to let him know that I am truly thankful to have a brother like him... HOW? that is the question...