I plan on excluding my sister from my personal life.
Did your sister to anything bad to you first?
I'll admit she hasn't done anything to me yet, but I have my gut feelings.
It doesn't seem fair to cut your sister off because of gut feelings. Your sister is family and if you take this for granted you may end up regretting not spending that time with her.
You don't understand. I was always a good brother to her and now she is going to ruin my life.
I just hope you understand how being upset with her for things that didn't happen is unfair. Try to give her the benefit of the doubt here.