Need an objective view

Today, I decided to go no contact with my ex fiancé. I seriously thought this guy was my soulmate. I have never felt so emotionally connected with somebody, but the relationship was so toxic towards the end. We were in a long distance relationship, I was in Illinois and he was in Tennessee. We’ve been together for four years and we’re basically engaged and started to plan our wedding for winter next year. when he came to visit me a few weeks ago, I found proof that he had downloaded dating apps at some point and paid for premium. He did not have any messages in these apps and said that he would just download it and delete as soon as he downloaded them because he felt so guilty. He would download it after big fights. He stated that he felt he used the likes from these apps for validation because he never felt appreciated.i have anger issues in the relationship, and we used to fight about things like him not giving me enough time or attention, him calling or smoking when he had a health condition, etc. he’d never complain about me and later said he felt he never had the space to. I miss him a lot, so much. Idk if what I decided to do was the right thing.