AITA if I don’t go to a surprise birthday party for a mean woman?

I (28F) have a group close group of friends who happen to be friends with a woman named Emma (38F). I have always been nice to Emma but never particularly liked her. Emma is kind of a mean girl for example she’s made back handed compliments and is not very approachable in general. The most recent interaction I had with her was at a dinner where she shooed me away with her hands to give my two closest friends hugs and completely ignored that I existed. I mean she didn’t say one word to me not even hello. It was honestly very hurtful but not at all out of character for her.

Recently my friends said that her birthday was coming up and we would all go out to dinner to celebrate her. I personally don’t want to go as I don’t look at her as a friend or a good person. I did talk to my other friend about it who used to have similar experiences with her and asked her opinion. She basically said it might show her that I do support Emma and maybe Emma and I can start a friendship. In the nicest way possible I don’t want a friendship with her. So AITA for not wanting to go celebrate her at a dinner?