You have a great many bad reasons, corrected the Hat. We are talking about this because you are not a cut-and-dry case. You might be successful in Slytherin, yes, you would have wealthy companions and amusing enemies, you need not try very hard to earn social and material wealth ... but you would not be happy. Not you, whose closest friend is a cousin with whom you share little but blood and a mutual annoyance with your parents. You would be happier in Ravenclaw, you know, or better yet, Hufflepuff.