I (21F) cheated back on my bf (22M) and now our relationship is better than ever

Last year, I (21F) caught my boyfriend (22M) of 4 years sexting other women totalling to over a year of our relationship. He was sending nudes, receiving nudes, and flirting. He had dating apps as well. He said he never met up with anyone in person but thought about it. I told him I forgave him, but resented him for what he did. He stopped doing it, but our relationship wasn't doing well and we were arguing all the time. He kept getting angry with me over little things and kept pushing me away. I ended up sexting this other girl (18F) and we were flirting and sending nudes to each other. I confessed to him right away what I did and he was upset for a couple days and didn't talk to me much. Then, he started treating me right. Doing all the things I had been asking of him. He started saying how much he loves me and how he's sorry for how angry he's been. Today, he bought me a nice pancake breakfast and had sex with me. He kept telling me he loves me and doesnt want to lose me. I feel like cheating back was a wakeup call for him to be better. I asked him if he did anything back and he said no because he didn't like the person he was when he did it in the past. Has anyone else experienced this? Is there still a chance to keep this relationship?