I need help boosting my sisters confidence and I'm worried about her.?

I used to have HUGE confidence issues, and i guess i still do, but i used to not be myself, it was always on my mind of how hideous i am, i couldn't stand the way i look and i just felt like an ugly waste of space, and i never wanted anyone to even set eyes on me. Now, i know i'll never be pretty but, nobodies perfect and looks aren't everything. I still think i'm genuinely the ugliest thing around, but i refuse to let the way i look stop me from living my life. I think you're sister just needs time to see that too. Make sure you tell her everyday she's beautiful, even if she denies it and just shakes it off, im sure deep down she'll appreciate it.