Marluxia?

White, it's all I see, - Castle Oblivion
Standing in this land- Goes with first line
Looking inside myself, there is nothing, - He's a Nobody
But desire and hatred. - Wants to take over organization XIII
In to my eyes he stares - You fight him in front of a doorway
Blocking the door from view - goes with the above line
My weapon summoned, my element twirling - He uses a scythe, which you need to spin to use
His head shall be a prize. - scythes cut off heads