@AlteredState01:
I didn't mean for it to sound as if the fact that I'm one year older is what is driving us apart. Like I said, I try to be courteous and empathetic... However, a year is a long time when one person is 14 and the other is 15. It probably isn't the actual length of time between us being born. Rather, I'd assume it's the lack of shared experiences that make us so different.

Perhaps I have changed the rules. But if anything, it makes me LESS biased. Using "I" statements rather than "you" statements. Differentiating between thinking, knowing, and feeling. Skills that come with maturity or rational thought. I've incorporated them into how I deal with people. I don't push these skills on other people, I don't hold them against anyone. I don't, despite what she thinks, have the whole world figured out, but I have enough of a grip on it as I need.

But the reason we can't fight anymore is because we're not playing by the same rules. I don't even know what her rules ARE, or if she has boundaries. I make a point not to attack or insult her. (In fact, I usually can't because I'm too busy defending my standpoint.) I've asked her not to attack me, but she still does a darn good job of it. If she asks for help, I'll give her my advice and tell her she can take it or leave it. I don't tell her what is right or wrong. I don't tell her the way she is or what problems she should work on. I always keep our common goal in mind.

I do wish she'd show me the same courtesy, at least the common courtesy not to degrade another person's religion.

I certainly don't want to control how she feels. It'd be wonderful if we could have a healthy debate without having it turn to what's wrong with me. But since we can't... I'm not putting up with these constant quarrels.