Was I wrong to tell my friend about my abusive grandad and set boundaries?

Should I tell my friend what her late grandad did to me as a child?

Here's an update. My friend started talking about her evil grandad and how much her mom hates him because I have issues with my dad. I told her grandad did to me, that he hit me when I was 5 and she was shocked and said its awful.

I then told her the next day not to mention him again to me because I am having trauma because of him. She replied I shouldn't speak about the dead anymore and started ignoring me.

I am having a different opinion now of her. I don't like her anymore.

Was I wrong to tell my friend about my abusive grandad and set boundaries?
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