I am having a few issues with my younger sister (I’m nearly 40, and she’s 35). She is a great person, but she has a few quirks that I’m finding hard to take these days. She talks a lot - she dominates any conversation going on around her, whether she knows anything about the subjects or not. She doesn’t listen at all - she spends her time while you’re talking thinking about what she wants to say next and waiting for you to take a breath so she can take over the conversation again.
The one that’s really getting to me, though, is that she says untrue things about people. She doesn’t lie, per se, but she gets ideas in her head (which aren’t particularly accurate because she wasn’t listening) and represents them as facts that may or not be true. Usually they are small items, like saying somebody loves some kind of food when in fact they hate it. When she says untrue things about me, I tend to defend myself and tell her that whatever isn’t true, but it feels petty to me to be making any kind of deal about these things, but I’m also not comfortable just leaving these untruths unchallenged. Oh yeah, she’s defensive and argumentative as well, so when I challenge her misperceptions, the argument is on.
I don’t know what to do about this combination of mildly unpleasant traits. I know I can’t change her, but I can change how I react to her, but I’m really not sure what would be effective. She is a good person, but self-centered, and I come away from interactions with her feeling, I don’t know - insignificant or something. Like my personal individuality was completely overlooked. Has anybody had any luck dealing with a self-centered personality like this? How do you describe the vague unpleasantness that you feel when dealing with someone like this? Why is this bugging me so much?

