All my life I have wanted to be the guy who makes others happy. Now I am living for myself, letting others make their own decisions and mistakes and now I'm the jerk.

Whatever, fine. I couldn't care less.

Except for now my sister believes it as well.

A bit of backstory: my sister and I have to live in a really bad narcissistic household, and I've been 'the nice guy' with her, as weird as that sounds. I've been trying to protect her from them by defending her in arguments and driving her around, I even stayed out of college and held myself back for a year so I could be at home and help her out, because I guess I felt I was her real parent. She couldn't talk to my parents, so she talked to me and vice versa, we had to be each other's parents in a way. And all that, but in hindsight it seems I probably should not have done that. I now feel like a weak cuck. Whatever, mistakes made and never again. But now she calls me a jerk for putting myself first and trying to live my own life?

I want to ignore this and keep living my life, but I didn't think that I would have to do this; to kind of leave my only real family. Is there any other thing I could do?