Forgiving someone!!caused body insecurities!?

So deep down I still resent my sister in law, she was the person that made me get an eating disorder when i was only in 5th grade, that’s the age I was when she moved in with us she was 17, I was a chubby little girl but I feel I was young I had time to lose weight if I wanted to but every single time I would eat anything she would say I was so ugly and fat that nobody would want me and every single time I would eat for years and my family never believed me because she would lie and say I told her something, I ended up becoming anorexic and would barely eat and I would constantly feel fat, then when years later I was in high school she would say you’re still fat if your not 100 pounds so here I was 115 pounds trying so hard to reach this number my body wasn’t meant to be in, she ended up moving out and things got better and now I’m 23 and of course we still see each other she’s married with my brother things are calm and she seems she’s changed but she never apologized to me and she caused such a big dent in my life,I over can’t my anorexia but still struggle with my body and there are moments that I don’t want to eat, I am a different person married with kids but trying to forgive her is so difficult especially because she never apologized, or made me see how she messed up,what would you do

I remember thinking I want to be thinner than I was nothing was good enough, now I know I was sick,being this thin I would have episode where I would pass out

Now I’m 23 and I’m happy with my daughters and another on the way, I want to forgive but it’s so difficult for me