Why do I feel relieved about my ex possibly cheating on me?

[Josephine]

Of course you're not wrong. Anyone would be relieved to see the end of a toxic, unhealthy relationship in which there was no trust. It takes a lot of energy to worry so much over the state of a relationship. Even people who are getting divorced - have maybe even lost everything to the other spouse (like I did) can feel relief at a bad relationship ending.

When there's nothing to mourn then there's nothing to mourn, you know?

Best thing to do now is take some time for yourself, shake off any leftover hurt feelings, and never speak to this rat again. He will definitely be back, and you should definitely just ignore him. He may have said he felt bad for hurting you but he still did it, didn't he? So good riddance - hell, have a party!