Would that really be fair? Would it be a matter of "turning down" other guys if she was meant to be loyal to you? I am not sure that should be something that is congratulated, but is simply a given, as otherwise you are not to be trusted.
Sometimes, you just can`t tell anybody how you really feel. Not because you don`t know why. Not because you don`t know your purpose. Not because you don`t trust them. But because you can`t find the right words to make them understand.