This was 2 years ago. I remember standing in my dad and stepmom's bathroom, cornered by my stepmom while my dad was drunk and upset with her. She yelled at me a lot, and would go on long rants about me quite often. I never remember what she says, mostly because my mind decides that it's dissociation time whenever she gets upset. She had me there for a good 45 minutes, and I processed almost none of what she said. 

The one thing I remember was her, almost smiling, saying, "you suck the happiness out of people's lives."

I think about that almost every day. No matter how many times I'm reassured that I do not do that, I can't help but feel like a real-life dementor. She has never apologized for that, and my dad doesn't seem to remember or just doesn't care. I don't want to bring it up because I'll be accused of trying to ruin their marriage, but the fact that such a comment is so irrelevant to them makes it feel even more true.