Well, after I thought about my last post, I felt like maybe I could fix things. I gave everything a few days. It grew easier to ignore the constant texts I was getting saying, "This is stupid." "Why can't we be friends?" But I knew we both needed a little time to sort things out.

I approached her again. I told her that I felt that our issue was not that we fought, rather, it was that we weren't fighting with the same rules. I was right in my assumption that she really never thought about any rules or boundaries prior to my bringing them up.

So I told her the rules that I fought by. Not just with her. General rules that I keep in mind in any disagreement. Such as:

Never attack anyone outright.
Determine the difference between thoughts, facts, and feelings, and communicate all three.
Always keep a goal in mind.
Take the time to think out a response that isn't easily misconstrued.
Consider the other person's feelings.
Ask questions as opposed to making assumptions.

(And of course, I don't claim that I never break these rules. I'm human. A relatively young one at that.)

I explained how to effectively use these rules. I explained "you" statements versus "I" statements. I told her the techniques I use to differentiate between thinking, knowing, and feeling. All the while, I asked for her input. "Does that make sense?" And it was good to know that she replied, "Yeah, it does."

I'm going to do all I can to level the playing field. Once that's done, I don't think we'll have any more issues. Only time will tell.

Additionally, I'm seeing a lot of criticism about my security that I'd like to further discuss. That's an issue that a few of my friends have with me, and I think most of these issues come from people not knowing my real feelings or intentions.

Here's one case. A friend of mine has always been very honest with me. So I asked him once how he felt about my musical ability. He wasn't keen on answering. He said he hated when people fished for compliments like that. Meanwhile, I was truly seeking an honest, unbiased opinion, since my own opinion and those of my parents aren't very good gauges of the truth. When I told him this, he admitted that was true and gave me an honest answer.

Now this friend that I started the topic about... She claimed that I think I have the whole world figured out, but I really don't. Of course, I'm quite aware that I don't have the whole world figured out. But I do have as much knowledge as I find necessary, and if I encounter a situation where I don't, then I learn new things promptly. The way I see it, I don't have the whole world figured out, but if I needed to, then it'd be possible for me.

Yes, I'm confident. Self-assured. I don't have the whole world figured out, but I have myself figured out.
The most common argument to that is, "Then why are you asking so many questions?" Indeed, it would seem that I'm looking for external gratification.
Meanwhile, I ask questions because I'm genuinely curious. I know who I am, but I don't take the time every day to think about how the world views me.
It's not like, "Oh my god... You think I have flaws?" It's more like, "Why do you think these are flaws?"

And @salukigirl:
Something my dad told me - "The true test of tolerance is if you can put up with an intolerant person." I definitely get where you're coming from, and it's part of why I've decided to give my friend another fair chance.