Getting divorced sucks when she seems so happy about it

My soon to be ex wife and I are getting divorced. In the beginning I admit that I was emotionally abusive, controlling, and selfish. Before we got married we broke up, I went into therapy and worked really hard on myself, and I came out a better person. After a few months apart, we got back together, got married, then had our 2nd kid. As soon as she recovered from giving birth, she started going out a lot and spending less time at home. I was doing my best to let her have her fun while I watched the kids. Then came a party in May of last year where she got extremely drunk and tried to get me to hook up with one of her friends. Nothing happened, but she didnt remember much of the night and woke up under the impression i tried to cheat on her and shes been angry ever since. Come september and she meets this guy who she kept claiming was just a friend. They started hanging out every time she was free and she completely disregarded my feelings about how they were too close. More fights start happening until Feb when we got into a huge screaming match on thebside of a highway while im saying horrible and nasty things to her. She wanted a divorce then, but we tried to work things out while being separated. Come march, i go on a trip and she sleeps with the guy. She confessed, told me it was nothing, but then proceeded to continue to sleep with him behind my back. Found out last week, got into a huge fight with me yellig and screaming.now she wants a divorce again