No, no you don't. If she really means that much to you then don't give up on her. Especially if you think you two WILL happen and last long. Really if you don't think you'll last that long, I don't see why you should bother. But if you think it'll be the type of relationship where you two almost never argue and stay together longer than everybody thinks, then you should totally go for it. I know I'm speaking for a majority of girls when I say that we like our boyfriends to be not just a boyfriend, but also a best friend.
Who's the corn muffin now, eh?