Oh for God's sake, can we stop all this "If you really loved him, you wouldn't care" ********. Physical attraction does matter in many relationships, especially at 19, and people are allowed to choose what they want in a partner without being called shallow or having it implied that they're preferences are immoral. Having a girlfriend/boyfriend isn't a right, and dating someone you're not attracted to isn't a responsibility. Maybe you're someone for whom personality is more important - fine - but don't judge people for not basing their life decisions on what might satisfy you in their place.
I don't have any advice for you, OP, but remember that there's nothing wrong with doing what's best for you and that nobody is obliged to date anyone they're not attracted to. At 19, it's also very likely that you'd end up splitting anyway for some other reason.