How do I get revenge on a man who cheated on me?

I'm a bit of an aggressive women when it comes to people doing wrong things, especially to me. My boyfriend cheated on my with a coworker of his, I found out when he forgot his phone at my apartment, he gave me his password before and I was curious in the moment so of course I had to go through his phone it was destined if he gave me his password.

I was going through his texts and found messages between him and another girl, talking about meeting up and flirting, and I was already packing his bags, putting them into literal trash bags and taking away the key to our house that was usually under the mat, left the trash bags outside with his phone and put a note on the door saying 'come back never'.

But in my mind, this really isn't enough, and I want him to have more Karma than just not being able to live with me. He still has his parents house (probably said I was the problem) and I desperately need to get him back again, any ideas? (That are legal and I won't get sued for :))

How do I get revenge on a man who cheated on me?
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