Best friend fucked my Boyfriend

I'm here for toxic revenge advice only. Today I found out that my best friend has been fucking my boyfriend behind my back.

I want revenge. Give me your most toxic advice. I do not care about jail or prison time.

(I do not want the whole stereotypical "oh, girl, you need to work on yourself and level up, meditate, work out and self care girly") shut the fuck up. This is not pilates or yoga this is my damn life.

Just an fyi and I live in a state where there is no capital punishment. So feel free to be creative.