My step sister and I had a rough patch back in 2017. It was a long time ago and I do not hate her for it. I was in a 3 year relationship with a guy who assaulted me. Everything about me.. he would follow me, put trackers on my car and my families, hit me, leave me stranded, you name it.

I told my step sister everything while it was happening because I felt safe with her. I haven’t really told anybody EVERYTHING so it meant a lot to me. I saw her in his car one day and he was following me home from work. She was laughing and even called me. When I answered she acted like I couldn’t see her 4 feet away from me. She started dating him and telling my dad and her mom that I was lying about everything. Made my dad hate me for years.

My ex eventually went to jail for everything he did to me and I had court ordered therapy for a minimum of 1 year. I had to stay for 2 and some months though.

I never talk to my step sister and not because I hate her but because I cannot trust her ever again. I do not want to build a relationship off of never being able to trust her. Our current no talking relationship doesn’t seem to bother our parents but maybe it does.. I rarely talk to my dad anyways.

My dad has invited me to his wife, my step sisters mom, birthday party. It was surprising cause I don’t get invited to those things and I would love to go. But my step sister is going. She is the type of person to cause a scene and be loud and confrontational. I’m afraid if I go I will just cause a fight. I’m afraid if I don’t go my dad will hate me.

I’ve thought about texting my step sister before the party to get on okay terms so nothing bad happens but I feel like I’m giving up. Am I wrong to not want to make amends? Even tho it was so long ago?

What would you do?