You obviously care for her and want her to be happy. Bravo! The world needs all the caring people it can get. I think where it gets tough being around someone like that is when we affirm what they are saying even when we disagree, but remain silent. Do YOU think the world is against her? I doubt it. But when we continue to agree with someone like that, are we being honest or maybe making things worse? I don't think its worth fighting every battle, but a true friend needs to be honest once in a while - or else you're adding fuel to the fire. Its also a matter of is it really your job to make her happy? And how much of your own happiness are you willing to sacrifice for her company? Like I said, don't need to win every discussion, but she needs to respect your need for happiness too. Take care.