I'm going to tell my sister that she shouldn't pursue her "dream", even though it's kinda realistic, because that's what she said to me.
Are you serious about this? Why are you telling her that she shouldn't pursue her dream?
She was mean to me about my dream
It is rude to be mean to people because you feel hurt about something. You should try to be the better person and you can watch them fail from far away.
I don't care, she should care about me more, who the hell is she to say all this to me.
You know how bad it made you feel when she criticized your dream. Do you really want to make her feel that same hurt. It would be good if you could forgive her and just encourage her to make her dream happen.