The purpose of our being here, is purely to procreate. This is what gives humans the urge to have sex. Whether we choose to reproduce or not doesn't change the urge we have. Essentially, anything we do is both for ourselves, and to get pussy. You cannot blame a guy for wanting to get pussy only. As for your "I want a boy for who I am", I may be mistaken, but I'm pretty sure your pussy constitutes as "you", unless you meant all guys are after your pet cat. Realistically, a human being lusting over the opposite sex for their anatomy is no different than going after them for their personality (personality is a side effect of years of evolution, so going after someone based on their looks is actually more natural). Both are things which cannot be changed (well, one as much as the other), so before you all jump in calling me shallow, liking a girl for their physique is not more or less shallow then liking a girl for their personality.
So to summarise, you have a right to be angry at a guy if they cheats on you, but being mad at guys for doing what is natural and instinctive to us is beyond a joke, so grow the **** up and stop sleeping around if it gets you upset. No normal guy is going to go after a girl with no pussy, hence no normal guy will go after a girl who doesn't open their pussy up for instinctive and natural purposes. Get a clue about the real world and the meaning of life, please.