Ah, I hadn't even thought to check if she was on your friends list. That must be where I recognized your icon from!

Since I don't know you, I didn't feel comfortable saying so directly, but I guess what I was trying (and, unfortunately, failing) to say indirectly was that I recognized the frustration that the situation with your friend was causing you, and that I could understand why you would be disturbed that this friendship was inspiring thoughts of verbal attacks. More importantly, I thought it was commendable that you not only recognized the temptation to make such attacks, but that you refused to give in to doing so. Rather, you sought to understand the situation better. (And that you not only looked at their behavior toward you, but also examined your behavior toward others.)

I also think it's neat that the rewards of choosing the introspective path included realizing that you do treat others well (and that your health issues have not changed that), as well as deciding that you would be better without this friendship in your life (and that it was okay for you to let the friendship go without being angry, snarky, or hurt).