@Panther, it's "Arachnaphobia". And no, your not a big boy.
Actually, the correct term is
you're.
Your implies that the person being spoken to has possession of whatever is being spoken about. Remember that
you're is actually a combination of two words and thus fulfills two very important roles in a sentence or clause. Because it includes both a pronoun and a verb, you're will always be the subject and at least part of the verb of any clause in which it appears.