Thanks everyone for your kind words. Yes, @Open Eyes, there was a fight when I confronted her about the sanitary napkins. She said a lot of things including that I was a narcissist and a hypocrite and that I think I'm perfect.

I tried to make her admit that before she got her own dog, we didn't live with pee and poop on the floor which she has normalized. But she has an excuse for everything and a way to blame me for her actions. The problem is that my sister's emotional instability got passed onto her dog. The dog is an emotional wreck. Every time he walks through the house, he gets excited/anxious to the point of losing control of his bowls and bladder, leaving a trail of pee and poop going through multiple rooms. This went on for 13+ years so I'm constantly freaking out because what used to be harmless clutter on the floor is now soiled with sewage. And I am so anxious about cleaning and disinfecting that I'm pretty sure I have OCD now. My sister says I'm a bully because I started demanding thst she clean up after her dog and herself. And I think it's unacceptable that I even have to talk about soemthing that should be basic decency.

I know she misinterprets things I say and accuses me of saying something different. Yesterday, I said that something she did gave me food poisoning (pouring yesterday's drinks into the coffee maker). And she said "You accused me of trying to kill you." And I said only said her actions caused food poisoning. And she said "Your exact words were 'you tried to kill me!'"

So it's possible she twists what other people said to fit what she wants to believe. The problem is that hearing this throughout my life makes me uneasy around people so I might come off prickly and untrusting and she succeeds in alienating me from people. And with Facebook, she has added most of my old friends as her friends so I don't really have a separate group of my own where I can be more myself.

And what disgusts me is that she denies that being the older sibling (2 years older) means that shen had been a sort of role model and that her bullying has an impact on how I grew up and my disapproval of her. She just claims to be a victim while accusing me of claiming to be a victim.

Thanks everyone for the encouragement. I think I let my sister scare me into socializing less and becoming more isoated. I really appreciate your patience with my moods and stuff lately.