Ways to get revenge 20 years later?

At my prom, my friend told my 3 year boyfriend I was cheating on him. Which I was but thats not the point. She ran out of the prom after she told him and I found out she was always jealous of me. It ruined my prom and My memories are awful. Another friend told me she was always jealous of me and talked bad about me behind my back.

I got back together with this guy 2 years layer and we were on and off 10 years. He always had a grudge on me.

I recently ran into her on Facebook and I know everything about her.

What are some ways I can get revenge

Updates
5 mo
Ok im calling the health insurance line and giving her phone number. Signing up for jebohas witness information, leaving girls panties thrown on her car so she thinks her husband is cheating, I found a whole bunch of things on tik tok
Ways to get revenge 20 years later?
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