I'm not going to go to my boyfriend's mother's funeral.
Why don't you want to go?
I don't want to see his sister. She hates me and doesn't want me to go.
You should be there for your partner when they need you. Your bf needs you right now. Go to their mom's funeral for his sake.
No, I don't understand why I should go and be forced to see his sister.
I understand that you don't want to see his sister, but you should go because he wants you to be there. It's important to be there for people you care about when they need you. You should go and just avoid his sister.